Selective electroreduction of CO2 into CO over Ag and Cu decorated carbon nanoflakes

被引：0

作者：

Faraz, Ahmad ^{[1
]}

Iqbal, Waheed ^{[1
]}

Gul, Shayan ^{[1
]}

Kanodarwala, Fehmida K. ^{[2
]}

Zafar, Muhammad Nadeem ^{[3
,4
]}

Xu, Guobao ^{[4
,5
]}

Nadeem, Muhammad Arif ^{[1
,4
]}

机构：

[1] Quaid i Azam Univ, Dept Chem, Islamabad 45320, Pakistan

[2] Univ Technol Sydney, Sydney, NSW 2007, Australia

[3] Univ Gujrat, Dept Chem, Gujrat 50700, Pakistan

[4] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China

[5] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China

来源：

ENERGY ADVANCES | 2024年 / 3卷 / 09期

关键词：

METAL-ORGANIC FRAMEWORKS; ELECTROCATALYTIC REDUCTION; NANOMATERIALS; PERFORMANCE; INSIGHTS; METHANOL; ETHYLENE;

D O I：

10.1039/d4ya00462k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrocatalytic CO2 reduction reaction (eCO(2)RR) has the potential to effectively cut carbon emission. However, the activity and selectivity of eCO(2)RR catalysts are topical due to the intricacy of the reaction components and mechanism. Herein, we have decorated silver and copper nanoparticles over carbon nanoflakes to achieve an Ag-Cu NPs/C system that enables selective reduction of CO2 into CO. The catalyst is prepared by incorporating Ag nanoparticles into a Cu-BTC MOF (HKUST-1) and subsequent carbonization that alters the surface composition, with improved activity and faradaic efficiency (FE) towards selective CO2 reduction. The evaluation of electrocatalytic performance reveals that the synthesized catalyst exhibits enhanced electrocatalytic activity and selectivity with a FECO of similar to 90% at -0.79 V-RHE and a current density (j) of 44.15 mA cm(-2) compared to Ag-NPs and Cu/C. The durability test over 40 h confirms the outstanding stability of Ag-Cu NPs/C. The lower Tafel slope value of only 75 mV dec(-1) corresponds to the fast reaction kinetics on the surface of Ag-Cu NPs/C. The synthetic protocol in this work offers an easy approach to the betterment of a cost-effective electrocatalyst with improved FE.

引用

页码：2367 / 2376

页数：10