{"id":{"repo_id":"cambridge","oai_identifier":"oai:www.repository.cam.ac.uk:1810/275355"},"canonical_url":"https://search.dev.ndltd.org/etd/cambridge/oai:www.repository.cam.ac.uk:1810/275355","repository":{"repo_id":"cambridge","name":"Cambridge University","base_url":"https://api.repository.cam.ac.uk/server/oai/request"},"display":{"title":"Adsorption and Reaction Microcalorimetry on Nickel and Platinum Single Crystal Surfaces","abstract":"The unique Cambridge single crystal adsorption microcalorimeter has been applied to a range of systems of catalytic interest to extract fundamental thermodynamic data. Coverage-dependent adsorption heats and sticking probabilities have been obtained with CO, NO, oxygen and ethylene adsorbates and Pt{110}, Ni{100}, Ni{110} and K/Ni{110} substrates. The initial adsorption heats for CO, NO, and O2 on Pt{110} are 183, 160 and 335 kJ mol$^{-1}$ respectively. Catalytic heat of reaction data for CO + O2 on Pt{110}, the first obtained on a single crystal surface, suggest that \"hot\" adatoms are involved in producing thermally excited CO2 product molecules. The first measurement of the heat of adsorption of a hydrocarbon on a single crystal surface has been made for ethylene on Pt{110}. The initial value of 200 kJ mol$^{-1}$, together with coverage dependent values, yield an average Pt–C binding energy of 231 kJ mol$^{-1}$. A detailed comparison of new data for oxygen adsorption on Ni{100} and Ni{110} with existing data for Ni{111} is presented, with initial adsorption heats of 550, 475 and 440 kJ (mol O2) -1 respectively, while the corresponding sticking data suggest that the oxide film created is four atomic layers thick in each case. Novel temperature-dependent data have been successfully collected using a pyroelectric detector for oxygen on Ni{100} at 100, 300 and 410 K with a Monte Carlo simulation of the highest-temperature data yielding a strong second-nearest neighbour interaction energy of +30 ± 5 kJ mol$^{-1}$. The adsorption of CO on K-predosed Ni{110} was found to differ markedly from previous data collected on Ni{100} for potassium coverages up to 0.35 ML, with the adsorption heat promoted by only ~ 30 kJ mol$^{-1}$ compared to ~ 180 kJ mol$^{-1}$ for the {100} surface, a difference ascribed to the missing row reconstruction of Ni{110}.","abstract_html":"The unique Cambridge single crystal adsorption microcalorimeter has been applied to a range of systems of catalytic interest to extract fundamental thermodynamic data. Coverage-dependent adsorption heats and sticking probabilities have been obtained with CO, NO, oxygen and ethylene adsorbates and Pt{110}, Ni{100}, Ni{110} and K/Ni{110} substrates. The initial adsorption heats for CO, NO, and O2 on Pt{110} are 183, 160 and 335 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span> respectively. Catalytic heat of reaction data for CO + O2 on Pt{110}, the first obtained on a single crystal surface, suggest that &quot;hot&quot; adatoms are involved in producing thermally excited CO2 product molecules. The first measurement of the heat of adsorption of a hydrocarbon on a single crystal surface has been made for ethylene on Pt{110}. The initial value of 200 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span>, together with coverage dependent values, yield an average Pt–C binding energy of 231 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span>. A detailed comparison of new data for oxygen adsorption on Ni{100} and Ni{110} with existing data for Ni{111} is presented, with initial adsorption heats of 550, 475 and 440 kJ (mol O2) -1 respectively, while the corresponding sticking data suggest that the oxide film created is four atomic layers thick in each case. Novel temperature-dependent data have been successfully collected using a pyroelectric detector for oxygen on Ni{100} at 100, 300 and 410 K with a Monte Carlo simulation of the highest-temperature data yielding a strong second-nearest neighbour interaction energy of +30 ± 5 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span>. The adsorption of CO on K-predosed Ni{110} was found to differ markedly from previous data collected on Ni{100} for potassium coverages up to 0.35 ML, with the adsorption heat promoted by only ~ 30 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span> compared to ~ 180 kJ mol<span class=\"etd-inline-math\"><sup>-1</sup></span> for the {100} surface, a difference ascribed to the missing row reconstruction of Ni{110}.","abstract_has_math":true,"creators":["Wartnaby, Charles"],"institution":"University of Cambridge","degree_name":"Doctor of Philosophy (PhD)","degree_level":"Doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995-10-24","date_published":"1995-10-24","updated_at":"2026-07-22T22:24:18Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":["https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/5f974b40-2362-4be0-ac40-d933e4959172/download","https://www.rioxx.net/licenses/all-rights-reserved/","https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/9ee118cb-bca8-4bff-974c-dff32497e8b8/download"],"identifier_entries":[]},"links":{"outbound_url":"https://doi.org/10.17863/CAM.22546","outbound_label":"DOI","outbound_source":"dc:identifier.doi"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Wartnaby, Charles"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["1995-10-24"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cambridge"]},{"key":"dc:relation.isreferencedby.uri","label":"Dc Relation Isreferencedby URI","values":["https://www.repository.cam.ac.uk/handle/1810/275355"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Doctor of Philosophy (PhD)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/5f974b40-2362-4be0-ac40-d933e4959172/download","https://www.rioxx.net/licenses/all-rights-reserved/","https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/9ee118cb-bca8-4bff-974c-dff32497e8b8/download"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.doi","label":"DOI","values":["10.17863/CAM.22546"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/834dd525-80ce-4284-b78e-120053758667/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The unique Cambridge single crystal adsorption microcalorimeter has been applied to a range of systems of catalytic interest to extract fundamental thermodynamic data. Coverage-dependent adsorption heats and sticking probabilities have been obtained with CO, NO, oxygen and ethylene adsorbates and Pt{110}, Ni{100}, Ni{110} and K/Ni{110} substrates. The initial adsorption heats for CO, NO, and O2 on Pt{110} are 183, 160 and 335 kJ mol$^{-1}$ respectively. Catalytic heat of reaction data for CO + O2 on Pt{110}, the first obtained on a single crystal surface, suggest that \"hot\" adatoms are involved in producing thermally excited CO2 product molecules. The first measurement of the heat of adsorption of a hydrocarbon on a single crystal surface has been made for ethylene on Pt{110}. The initial value of 200 kJ mol$^{-1}$, together with coverage dependent values, yield an average Pt–C binding energy of 231 kJ mol$^{-1}$. A detailed comparison of new data for oxygen adsorption on Ni{100} and Ni{110} with existing data for Ni{111} is presented, with initial adsorption heats of 550, 475 and 440 kJ (mol O2) -1 respectively, while the corresponding sticking data suggest that the oxide film created is four atomic layers thick in each case. Novel temperature-dependent data have been successfully collected using a pyroelectric detector for oxygen on Ni{100} at 100, 300 and 410 K with a Monte Carlo simulation of the highest-temperature data yielding a strong second-nearest neighbour interaction energy of +30 ± 5 kJ mol$^{-1}$. The adsorption of CO on K-predosed Ni{110} was found to differ markedly from previous data collected on Ni{100} for potassium coverages up to 0.35 ML, with the adsorption heat promoted by only ~ 30 kJ mol$^{-1}$ compared to ~ 180 kJ mol$^{-1}$ for the {100} surface, a difference ascribed to the missing row reconstruction of Ni{110}."]},{"key":"dc:format.checksum.md5","label":"Dc Format Checksum Md5","values":["0ec411b462fb56c21322393fd16e0e59","87eda9de84448d1f82354d60eee3eb5f","c5615aa02c2a9b786f0eb5bc237cd290"]},{"key":"dc:title","label":"Title","values":["Adsorption and Reaction Microcalorimetry on Nickel and Platinum Single Crystal Surfaces"]}]}],"canonical_facts":{"dc:creator":["Wartnaby, Charles"],"dc:date.issued":["1995-10-24"],"dc:description.abstract":["The unique Cambridge single crystal adsorption microcalorimeter has been applied to a range of systems of catalytic interest to extract fundamental thermodynamic data. Coverage-dependent adsorption heats and sticking probabilities have been obtained with CO, NO, oxygen and ethylene adsorbates and Pt{110}, Ni{100}, Ni{110} and K/Ni{110} substrates. The initial adsorption heats for CO, NO, and O2 on Pt{110} are 183, 160 and 335 kJ mol$^{-1}$ respectively. Catalytic heat of reaction data for CO + O2 on Pt{110}, the first obtained on a single crystal surface, suggest that \"hot\" adatoms are involved in producing thermally excited CO2 product molecules. The first measurement of the heat of adsorption of a hydrocarbon on a single crystal surface has been made for ethylene on Pt{110}. The initial value of 200 kJ mol$^{-1}$, together with coverage dependent values, yield an average Pt–C binding energy of 231 kJ mol$^{-1}$. A detailed comparison of new data for oxygen adsorption on Ni{100} and Ni{110} with existing data for Ni{111} is presented, with initial adsorption heats of 550, 475 and 440 kJ (mol O2) -1 respectively, while the corresponding sticking data suggest that the oxide film created is four atomic layers thick in each case. Novel temperature-dependent data have been successfully collected using a pyroelectric detector for oxygen on Ni{100} at 100, 300 and 410 K with a Monte Carlo simulation of the highest-temperature data yielding a strong second-nearest neighbour interaction energy of +30 ± 5 kJ mol$^{-1}$. The adsorption of CO on K-predosed Ni{110} was found to differ markedly from previous data collected on Ni{100} for potassium coverages up to 0.35 ML, with the adsorption heat promoted by only ~ 30 kJ mol$^{-1}$ compared to ~ 180 kJ mol$^{-1}$ for the {100} surface, a difference ascribed to the missing row reconstruction of Ni{110}."],"dc:format.checksum.md5":["0ec411b462fb56c21322393fd16e0e59","87eda9de84448d1f82354d60eee3eb5f","c5615aa02c2a9b786f0eb5bc237cd290"],"dc:identifier.doi":["10.17863/CAM.22546"],"dc:identifier.uri":["https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/834dd525-80ce-4284-b78e-120053758667/download"],"dc:language":["en"],"dc:publisher.institution":["University of Cambridge"],"dc:relation.isreferencedby.uri":["https://www.repository.cam.ac.uk/handle/1810/275355"],"dc:rights":["https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/5f974b40-2362-4be0-ac40-d933e4959172/download","https://www.rioxx.net/licenses/all-rights-reserved/","https://apollo8-f-pro.lib.cam.ac.uk/bitstreams/9ee118cb-bca8-4bff-974c-dff32497e8b8/download"],"dc:title":["Adsorption and Reaction Microcalorimetry on Nickel and Platinum Single Crystal Surfaces"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["Doctoral"],"dc:type.qualificationname":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-22T22:24:18Z"}