Bimetallic Synergy in Ultrafine Cocatalyst Alloy Nanoparticles for Efficient Photocatalytic Water Splitting

Christian Mark Pelicano; Masaki Saruyama; Ryo TakahataRyota SatoYasutaka KitahamaHiroyuki MatsuzakiTaro YamadaTakashi HisatomiKazunari DomenToshiharu Teranishi

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Bimetallic Synergy in Ultrafine Cocatalyst Alloy Nanoparticles for Efficient Photocatalytic Water Splitting

机译：Bimetallic Synergy in Ultrafine Cocatalyst Alloy Nanoparticles for Efficient Photocatalytic Water Splitting

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Herein, PtRu solid-solution alloy nanoparticles enable high-performance H_2evolution reaction cocatalysts through the transfer of knowledge from electrocatalysisto photocatalysis. Ultrafine PtRu alloy nanoparticles (1.0 ± 0.2 nmin diameter) are synthesized by using a chemical polyol method and used forelectro/photo-catalyses. Integration of PtRu nanoparticles with carbon and AldopedSrTiO_3 powders via liquid-phase adsorption and successive two-stepair and H_2 annealing ensures uniform deposition of PtRu alloy nanoparticles(<2 nm) with a solid-solution structure. The PtRu alloy nanoparticles exhibithigher electrocatalytic activity for the hydrogen evolution reaction thanmonometallic Pt counterparts. Modifying Al-doped SrTiO_3 with PtRu alloynanoparticles results in efficient photocatalytic overall water-splitting activitywith an apparent quantum yield of 65% at 365 nm and a solar-to-hydrogenenergy conversion efficiency of 0.45%, which are the highest values amongSrTiO_3-based photocatalytic water splitting systems with Rh-free cocatalysts.Transient diffuse reflectance spectroscopy reveals that the PtRu nanoparticleshave a superior electron-capturing ability than the Pt counterparts, probablydue to the decreased work function of Pt by alloying with Ru. This work establishesa framework to elucidate catalytic trends and provides rational designguidance toward the development of bimetallic solid-solution nanoparticlesas cost-effective and highly active cocatalysts for overall water splitting.

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《Advanced functional materials》 |2022年第31期|2202987.1-2202987.10|共10页
作者
Christian Mark Pelicano; Masaki Saruyama; Ryo TakahataRyota SatoYasutaka KitahamaHiroyuki MatsuzakiTaro YamadaTakashi HisatomiKazunari DomenToshiharu Teranishi;
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Institute for Chemical ResearchKyoto UniversityGokasho, Uji, Kyoto 611-0011, Japan;

Research Institute for Material and Chemical MeasurementNational Metrology Institute of Japan (NMIJ)National Institute of Advanced Industrial Science and Technology (AIST)Tsukuba 1-1-1 Higashi, Tsukuba, Ibaraki 305–8565, Japan;

Office of University ProfessorThe University of Tokyo2-11-6 Yayoi, Bunkyo-ku, Tokyo 113–8656, JapanResearch Initiative for Supra-MaterialsShinshu University4-17-1, Wakasato, Nagano 380–8553, JapanOffice of University ProfessorThe University of Tokyo2-11-6 Yayoi, Bunkyo-ku, Tokyo 113–8656, Japan,Research Initiative for Supra-MaterialsShinshu University4-17-1, Wakasato, Nagano 380–8553, Japan;

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正文语种英语
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hydrogen evolution reaction; photocatalytic water splitting; synergetic alloying; solid-solution nanoparticles; water reduction cocatalysts;

Bimetallic Synergy in Ultrafine Cocatalyst Alloy Nanoparticles for Efficient Photocatalytic Water Splitting

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