首页|Palladium single atoms from melting nanoparticles on WO3-x for boosted hydrogen evolution reaction

Palladium single atoms from melting nanoparticles on WO3-x for boosted hydrogen evolution reaction

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Surface-supported isolated atoms in single-atom catalysts(SACs)grant maximum utilization of metals in heterogeneous catalysis.Herein,we report a feasible pyrolysis strategy to synthesize Pd single atoms by thermally melting Pd nanoparticles on an oxygen-vacancy-rich tungsten-oxide matrix at reduction atmo-sphere.Near ambient pressure X-ray photoelectron spectroscopy was used to monitor the formation of zero-valence Pd single atoms and the increased metallic feature of WO3-x substrate.Accordingly,the as-obtained zero-valence Pd single-atom catalyst exhibits a markedly boosted HER activity with a low overpotential(η10=70 mV)at the current density of 10 mA/cm2 and a small Tafel slope(b=68 mV/dec),nearly 150 mV and a 3.0-fold enhancement than those of Pd nanoparticles(η10=220 mV,b=133 mV/dec)under the same conditions.In addition,quasi in situ XPS results suggest the hydrogen spillover effect is more likely to occur on Pd single atoms during the electrochemical process.Our work may pave an interesting route for the rational design of highly-efficient single-atom catalysts,and the elucidation of corresponding enhanced reaction mechanisms by the utilization of advanced characteriza-tion techniques.

PdWO3-xSingle-atom catalystsNAP-XPSHER

Zhongmiao Gong、Zhigang Chen、Hao Li、Guang Yang、Min Yuan、Zhiyun Li、Xueying Wan、Yi Cui

展开 >

School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,Anhui,China

i-lab,Vacuum Interconnected Nanotech Workstation,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,Jiangsu,China

School of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China

Key Laboratory of Precision and Intelligent Chemistry,School of Chemistry and Materials Science,Hefei National Research Center for Physical Sciences at the Microscale,National Synchrotron Radiation Laboratory,School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,Anhui,China

展开 >

We would like to acknowledge the support from the National Key Research and Development Program of China国家自然科学基金国家自然科学基金国家自然科学基金Nano-X from Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences

2022YFA1503801221721902220223222109171

2024

10.1016/j.jechem.2023.11.033

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)：2024.91(4)
  • 51