| Texto completo | |
| Autor(es): Mostrar menos - |
Mo, Jiaying
[1]
;
Barbosa, Eduardo C. M.
[2, 1]
;
Wu, Simson
[1]
;
Li, Yiyang
[1]
;
Sun, Yuancheng
[1]
;
Xiang, Weikai
[3]
;
Li, Tong
[3]
;
Pu, Shengda
[4]
;
Robertson, Alex
[4]
;
Wu, Tai-sing
[5, 6]
;
Soo, Yun-liang
[5, 6]
;
Alves, V, Tiago
;
Camargo, Pedro H. C.
[2, 7]
;
Kuo, Winson
[8]
;
Tsang, Shik Chi Edman
[1]
Número total de Autores: 15
|
| Afiliação do(s) autor(es): | [1] Univ Oxford, Dept Chem, Wolfson Catalysis Ctr, Oxford OX1 3QR - England
[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP - Brazil
[3] Ruhr Univ Bochum, Inst Mat, Univ Str 150, D-44801 Bochum - Germany
[4] Univ Oxford, Dept Mat, Oxford OX1 3PH - England
[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 300 - Taiwan
[6] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300 - Taiwan
[7] Univ Helsinki, Dept Chem, AI Virtasen Aukio 1, Helsinki 00560 - Finland
[8] Texas A&M Univ, Mat Characterizat Facil, 3471 TAMU, College Stn, TX 77843 - USA
Número total de Afiliações: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ADVANCED FUNCTIONAL MATERIALS; v. 31, n. 30 JUL 2021. |
| Citações Web of Science: | 1 |
| Resumo | |
Traditionally, bandgap materials are a prerequisite to photocatalysis since they can harness a reasonable range of the solar spectrum. However, the high impedance across the bandgap and the low concentration of intrinsic charge carriers have limited their energy conversion. By contrast, metallic nanoparticles possess a sea of free electrons that can effectively promote the transition to the excited state for reactions. Here, an atomic layer of a bimetallic concoction of silver-gold shells is precisely fabricated onto an Au core via a sonochemical dispersion approach to form a core-shell of Au-Ag that exploits the wide availability of excited states of Ag while maintaining an efficient localized surface plasmon resonance (LSPR) of Au. Catalytic results demonstrate that this mix of Ag and Au can convert solar energy to hydrogen at high efficiency with an increase of 112.5% at an optimized potential of -0.5 V when compared to light-off conditions under the electrochemical LSPR. This outperforms the commercial Pt catalysts by 62.1% with a hydrogen production rate of 1870 mu mol g(-1) h(-1) at room temperature. This study opens a new route for tuning the range of light capture of hydrogen evolution reaction catalysts using fabricated core-shell material through the combination of LSPR with electrochemical means. (AU) | |
| Processo FAPESP: | 18/00393-6 - Materiais controlados de TiO2 decorados com nanopartículas metálicas: relação estrutura-performance e investigações mecanísticas na reação de hidrogenação de CO2 |
| Beneficiário: | Eduardo César Melo Barbosa |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 15/11452-5 - Materiais híbridos compostos por óxidos e nanopartículas metálicas para aplicações catalíticas e fotocatalíticas |
| Beneficiário: | Eduardo César Melo Barbosa |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |