Modified electronic structure and enhanced hydroxyl adsorption make quaternary Pt-based nanosheets efficient anode electrocatalysts for formic acid-/alcohol-air fuel cells

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外文摘要：Surface/interface engineering of a multimetallic nanostructure with diverse electrocatalytic properties for direct liquid fuel cells is desirable yet challenging.Herein,using visible light,a class of quaternary PtAgBiTe ultrathin nanosheets is fabricated and used as high-performance anode electrocatalysts for for-mic acid-/alcohol-air fuel cells.The modified electronic structure of Pt,enhanced hydroxyl adsorption,and abundant exterior defects afford Pt1Ag0.1Bi0.16Te0.29/C high intrinsic anodic electrocatalytic activity to boost the power densities of direct formic acid-/methanol-/ethanol-/ethylene glycol-/glycerol-air fuel cells,and the corresponding peak power density of Pt1Ag0.1Bi0.16Te0.29/C is respectively 129.7,142.3,105.4,124.3,and 128.0 mW cm-2,considerably outperforming Pt/C.Operando in situ Fourier transform infrared reflection spectroscopy reveals that formic acid oxidation on Pt1Ag0.1Bi0.16Te0.29/C occurs via a CO-free direct pathway.Density functional theory calculations show that the presence of Ag,Bi,and Te in Pt1Ag0.1Bi0.16Te0.29 suppresses CO*formation while optimizing dehydrogenation steps and synergis-tic effect and modified Pt effectively enhance H2O dissociation to improve electrocatalytic performance.This synthesis strategy can be extended to 43 other types of ultrathin multimetallic nanosheets(from ternary to octonary nanosheets),and efficiently capture precious metals(i.e.,Pd,Pt,Rh,Ru,Au,and Ag)from different water sources.

外文关键词：

Pt-based nanosheetsModified electronic structureEnhanced hydroxyl adsorptionFormic acid and alcohol oxidationDirect liquid fuel cells

作者：

Fengling Zhao、Qiang Yuan、Siyang Nie、Liang Wu、Xun Wang

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作者单位：

State-Local Joint Laboratory for Comprehensive Utilization of Biomass,Center for R&D of Fine Chemicals,College of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,Guizhou,China

Key Lab of Organic Optoelectronics & Molecular Engineering,Tsinghua University,Beijing 100084,China

School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaEducation Department of Guizhou ProvinceFoundation of Guizhou ProvinceNational Key R&D Program of ChinaState Key Laboratory of Physical Chemistry of Solid SurfacesState Key Laboratory of Physical Chemistry of Solid Surfaces

项目编号：

215710382203500420213122019-56662017YFA0700101Xiamen University202009

出版年：

2024

DOI：

10.1016/j.jechem.2023.12.042

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.92(5)