当前位置：
X-MOL 学术
›
ACS Appl. Energy Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
CuS Nanosheet Arrays for Electrochemical CO2 Reduction with Surface Reconstruction and the Effect on Selective Formation of Formate
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-03-11 , DOI: 10.1021/acsaem.0c03190 Tong Dou 1 , Yang Qin 1 , Fazhi Zhang 1 , Xiaodong Lei 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-03-11 , DOI: 10.1021/acsaem.0c03190 Tong Dou 1 , Yang Qin 1 , Fazhi Zhang 1 , Xiaodong Lei 1
Affiliation
|
Copper-based catalysts have shown excellent performance in electrochemical CO2 reduction, but there has not been much study on copper sulfides. In our work, a simple and low-temperature chemical bath deposition method was used to fabricate CuS nanosheet arrays on brass, on which a Faradaic efficiency over 70% and a production rate over 50 mA·cm–2 for formate were obtained at a low potential of −0.7 V vs RHE when used as a catalytic electrode for CO2 reduction. During the CO2 reduction process, CuS nanosheets were partially reduced to Cu0 and reconstructed to a nanowire network. It was found that residual S beneath the Cu0 layer lowered the binding energies of intermediates HCOO* and *COOH, promoting their desorption and the successive formation of HCOOH or HCOO–, thus regulating the high selectivity of the product. This work provides a convenient and economical method for developing a highly active electrocatalyst for producing HCOOH in CO2 electroreduction, and it is beneficial to understand the mechanism of enhanced selectivity to HCOO– for CuS electrode materials.
中文翻译：
用于表面还原的电化学还原CO 2的CuS纳米片阵列及其对甲酸酯选择性形成的影响
铜基催化剂在电化学还原CO 2方面显示出优异的性能，但是对硫化铜的研究还很少。在我们的工作中，使用一种简单且低温的化学浴沉积方法在黄铜上制备CuS纳米片阵列，在此方法上，法拉第效率高达70％，甲酸的生产率超过50 mA·cm -2。当用作还原CO 2的催化电极时，-RHE的电位为-0.7 V vs. RHE 。在CO 2还原过程中，CuS纳米片被部分还原为Cu 0并重建为纳米线网络。发现Cu 0下的残留S层降低中间体HCOO *和* COOH，促进它们的解吸和HCOOH或HCOO的连续形成的结合能- ，从而调节了产品的高选择性。这项工作提供了用于开发高活性的电催化剂在CO产生HCOOH一种方便且经济的方法2电解还原，并且是有益的理解提高的选择性的以HCOO机制-为的CuS的电极材料。
更新日期：2021-03-11
中文翻译：
用于表面还原的电化学还原CO 2的CuS纳米片阵列及其对甲酸酯选择性形成的影响
铜基催化剂在电化学还原CO 2方面显示出优异的性能，但是对硫化铜的研究还很少。在我们的工作中，使用一种简单且低温的化学浴沉积方法在黄铜上制备CuS纳米片阵列，在此方法上，法拉第效率高达70％，甲酸的生产率超过50 mA·cm -2。当用作还原CO 2的催化电极时，-RHE的电位为-0.7 V vs. RHE 。在CO 2还原过程中，CuS纳米片被部分还原为Cu 0并重建为纳米线网络。发现Cu 0下的残留S层降低中间体HCOO *和* COOH，促进它们的解吸和HCOOH或HCOO的连续形成的结合能- ，从而调节了产品的高选择性。这项工作提供了用于开发高活性的电催化剂在CO产生HCOOH一种方便且经济的方法2电解还原，并且是有益的理解提高的选择性的以HCOO机制-为的CuS的电极材料。
京公网安备 11010802027423号