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Disordered Au Nanoclusters for Efficient Ammonia Electrosynthesis

Journal Article · · ChemSusChem
 [1];  [2];  [3];  [4];  [4];  [5];  [6];  [7];  [8];  [4];  [9];  [10];  [4];  [3];  [2]
  1. Chinese Academy of Sciences (CAS), Fuzhou (China). Fujian Institute of Research on the Structure of Matter; Zhejiang Univ., Quzhou (China)
  2. Univ. of California, Irvine, CA (United States)
  3. Tianjin Univ. of Technology, Tianjin (China)
  4. Tamkang Univ., Taipei (Taiwan)
  5. Chinese Academy of Sciences (CAS), Fuzhou (China). Fujian Institute of Research on the Structure of Matter; Univ. of California, Irvine, CA (United States)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  7. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  8. Guangxi Univ., Nanning (China)
  9. Chengdu University (China)
  10. Zhengzhou University (China)

The electrochemical nitrogen (N2) reduction reaction (N2RR) under mild conditions is a promising and environmentally friendly alternative to the traditional Haber-Bosch process with high energy consumption and greenhouse emission for the synthesis of ammonia (NH3), but high-yielding production is rendered challenging by the strong nonpolar N≡N bond in N2 molecules, which hinders their dissociation or activation. In this study, disordered Au nanoclusters anchored on two-dimensional ultrathin Ti3C2Tx MXene nanosheets are explored as highly active and selective electrocatalysts for efficient N2-to-NH3 conversion, exhibiting exceptional activity with an NH3 yield rate of 88.3±1.7 μg h–1 mgcat.–1 and a faradaic efficiency of 9.3±0.4 %. Further, a combination of in situ near-ambient pressure X-ray photoelectron spectroscopy and operando X-ray absorption fine structure spectroscopy is employed to unveil the uniqueness of this catalyst for N2RR. The disordered structure is found to serve as the active site for N2 chemisorption and activation during the N2RR process.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1963189
Alternate ID(s):
OSTI ID: 1923938
Report Number(s):
BNL-224155-2023-JAAM
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Journal Issue: 7 Vol. 16; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

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