Tuning selectivity of electrochemical reduction reaction of CO2 by atomically dispersed Pt into SnO2 nanoparticles

Xiaoxia Zhou, Erhong Song, Zhaoyu Kuang, Zhe Gao, Han Zhao, Jianjun Liu, Shuhui Sun, Chung Yuan Mou, Hangrong Chen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Electrochemical reduction of CO2 into fuels offers an attractive approach to environmental and energy sustainability. Herein, we designed atomically dispersed Pt into SnO2 catalyst (Pt atom/SnO2). Such catalyst dramatically improves the adsorption performance of CO2 and lowers the activation energy of CO2. DFT calculations indicate that the doping of Pt in SnO2 could induce charge redistribution and tune active electronic state, showing higher adsorption energy for intermediates CO2*, HCOO* and HCOOH*, which is different from the Pt NPs loaded SnO2 mainly for H2 generation. As a result, a higher Faradaic efficiency (82.1 ± 1.4%) and the production rate (5105 μmol h−1 cm−2) of HCOO are achieved at −1.2 V vs. RHE. Moreover, the current density and Faradaic efficiency of HCOO nearly remain unchanged in 8 h on the Pt atom/SnO2, indicating its high stability. This work opens up a new avenue to tune product selectivity by atomically dispersed catalysts.

Original languageEnglish
Article number133035
JournalChemical Engineering Journal
Volume430
DOIs
Publication statusPublished - Feb 15 2022
Externally publishedYes

Keywords

  • atomically dispersed Pt
  • CO reduction
  • DFT
  • HCOO
  • SnO

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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