Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts
In this work, we present a facile route to prepare electrocatalysts for methanol oxidation. The catalystsynthesis route involves the simultaneous reduction and nitrogen doping of graphene oxide (GO) along with the reduction of H2PtCl6 to Pt by a facile ammonia gas heat-treatment and quenching proces...
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| Format: | Journal Article |
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Elsevier BV North-Holland
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/43625 |
| _version_ | 1848756755173998592 |
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| author | Xiong, B. Zhou, Y. O'Hayre, R. Shao, Zongping |
| author_facet | Xiong, B. Zhou, Y. O'Hayre, R. Shao, Zongping |
| author_sort | Xiong, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this work, we present a facile route to prepare electrocatalysts for methanol oxidation. The catalystsynthesis route involves the simultaneous reduction and nitrogen doping of graphene oxide (GO) along with the reduction of H2PtCl6 to Pt by a facile ammonia gas heat-treatment and quenching process. The resulting catalysts are characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy while their electrocatalytic activity toward the oxidation of methanol is evaluated by cyclic voltammetry. The obtained Pt/graphene composites consist of crystalline Pt nanoparticles in the range of 1–4 nm which are well-dispersed on the N-doped graphene sheets. The best Pt/N-graphene catalyst composite is obtained after a 5 min ammonia treatment at 800 ?C followed by rapid ammonia gas quenching at room temperature. This catalyst demonstrates superior catalytic activity for methanol electro-oxidation, with a peak current density of 0.218 A mgPt-1, which is about five times higher than an undoped (hydrogen treated and quenched) Pt/graphene control catalyst. The excellent electrocatalytic performance of the ammonia quenched catalyst is attributed to the nitrogenous functional groups and dopants in the graphene sheets that are formed during the facile quenching process in ammonia. |
| first_indexed | 2025-11-14T09:17:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-43625 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:17:14Z |
| publishDate | 2013 |
| publisher | Elsevier BV North-Holland |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-436252017-09-13T13:37:33Z Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts Xiong, B. Zhou, Y. O'Hayre, R. Shao, Zongping Heat treatment Methanol oxidation Nitrogen-doped graphene Platinum Electrocatalyst In this work, we present a facile route to prepare electrocatalysts for methanol oxidation. The catalystsynthesis route involves the simultaneous reduction and nitrogen doping of graphene oxide (GO) along with the reduction of H2PtCl6 to Pt by a facile ammonia gas heat-treatment and quenching process. The resulting catalysts are characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy while their electrocatalytic activity toward the oxidation of methanol is evaluated by cyclic voltammetry. The obtained Pt/graphene composites consist of crystalline Pt nanoparticles in the range of 1–4 nm which are well-dispersed on the N-doped graphene sheets. The best Pt/N-graphene catalyst composite is obtained after a 5 min ammonia treatment at 800 ?C followed by rapid ammonia gas quenching at room temperature. This catalyst demonstrates superior catalytic activity for methanol electro-oxidation, with a peak current density of 0.218 A mgPt-1, which is about five times higher than an undoped (hydrogen treated and quenched) Pt/graphene control catalyst. The excellent electrocatalytic performance of the ammonia quenched catalyst is attributed to the nitrogenous functional groups and dopants in the graphene sheets that are formed during the facile quenching process in ammonia. 2013 Journal Article http://hdl.handle.net/20.500.11937/43625 10.1016/j.apsusc.2012.12.053 Elsevier BV North-Holland restricted |
| spellingShingle | Heat treatment Methanol oxidation Nitrogen-doped graphene Platinum Electrocatalyst Xiong, B. Zhou, Y. O'Hayre, R. Shao, Zongping Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title | Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title_full | Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title_fullStr | Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title_full_unstemmed | Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title_short | Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts |
| title_sort | facile single-step ammonia heat-treatment and quenching process for the synthesis of improved pt/n-graphene catalysts |
| topic | Heat treatment Methanol oxidation Nitrogen-doped graphene Platinum Electrocatalyst |
| url | http://hdl.handle.net/20.500.11937/43625 |