Title:
ETCHED COPPER CATALYST FOR ELECTROCHEMICAL CO2 REDUCTION INTO METHANE, PREPARATION METHOD THEREFOR, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/012313
Kind Code:
A1
Abstract:
The present invention relates to an etched copper catalyst for an electrochemical CO2 reduction into methane, a preparation method therefor and a use thereof. The catalyst uses a commercial copper foil as a main body, and active sites are obtained by means of electroetching, where the active sites are Cu(111) crystal surfaces. The preparation method comprises: pickling a commercial copper foil to remove surface impurities and an oxide layer; placing the pickled copper foil into an acidic electrolyte for potentiostatic etching; cleaning the etched copper foil, and then carrying out vacuum drying in an inert atmosphere to obtain the copper catalyst. The use comprises: introducing CO2 into a cathode electrolytic cell, pre-saturating an electrolyte, and performing activation treatment on a working electrode; with CO2 being continuously introduced, utilizing potentiostatic electrolysis, and electrochemically reducing CO2 into methane. The catalyst disclosed by the present invention has a simple preparation method and is high in catalytic activity, same can realize electrocatalytic CO2 reduction into methane, and same has higher selectivity.
Inventors:
XIAO RUI (CN)
XU WEICONG (CN)
LIU CHAO (CN)
LI PEIJUN (CN)
DING XIAOWEN (CN)
LI XINYU (CN)
LU XIANJUN (CN)
XU WEICONG (CN)
LIU CHAO (CN)
LI PEIJUN (CN)
DING XIAOWEN (CN)
LI XINYU (CN)
LU XIANJUN (CN)
Application Number:
PCT/CN2023/105676
Publication Date:
January 18, 2024
Filing Date:
July 04, 2023
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
C25B3/26; C25B3/03; C25B11/04; C25F3/02
Foreign References:
| CN115216792A | 2022-10-21 | |||
| US4767661A | 1988-08-30 | |||
| CN110586953A | 2019-12-20 | |||
| CN110651070A | 2020-01-03 | |||
| CN112941553A | 2021-06-11 |
Other References:
LING, PEIQUAN ET AL.: "Surface Engineering on Commercial Cu Foil for Steering C2H4/ CH 4 Ratio in CO2 Electroreduction", NANO LETTERS, vol. 22, no. 7, 24 March 2022 (2022-03-24), pages 2988 - 2994, XP093127319, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.2c00189
Y. HORI ET AL.: "Adsorption of CO Accompanied with Simultaneous Charge Transfer on Copper Single Crystal Electrodes Related with Electrochemical Reduction of CO2 to Hydrocarbons", SURFACE SCIENCE, vol. 335, no. 1-3, 28 November 1994 (1994-11-28), pages 258 - 263, XP005877754, ISSN: 0039-6028, DOI: 10.1016/0039-6028(95)00441-6
Y. HORI ET AL.: "Adsorption of CO Accompanied with Simultaneous Charge Transfer on Copper Single Crystal Electrodes Related with Electrochemical Reduction of CO2 to Hydrocarbons", SURFACE SCIENCE, vol. 335, no. 1-3, 28 November 1994 (1994-11-28), pages 258 - 263, XP005877754, ISSN: 0039-6028, DOI: 10.1016/0039-6028(95)00441-6
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
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