Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro, Tokyo, 152-8552, Japan.
Uzbek-Japan Innovation Center of Youth, Tashkent 100095, Uzbekistan.
ACS Appl Mater Interfaces. 2023 May 17;15(19):23299-23305. doi: 10.1021/acsami.3c02874. Epub 2023 May 4.
A copper-zirconia composite having an evenly distributed lamellar texture, Cu#ZrO, was synthesized by promoting nanophase separation of the CuZr alloy precursor in a mixture of carbon monoxide (CO) and oxygen (O). High-resolution electron microscopy revealed that the material consists of interchangeable Cu and t-ZrO phases with an average thickness of 5 nm. Cu#ZrO exhibited enhanced selectivity toward the generation of formic acid (HCOOH) by electrochemical reduction of carbon dioxide (CO) in aqueous media at a Faradaic efficiency of 83.5% at -0.9 V versus the reversible hydrogen electrode. In situ Raman spectroscopy has revealed that a bifunctional interplay between the Zr sites and the Cu boundary leads to amended reaction selectivity along with a large number of catalytic sites.
一种具有均匀层状纹理的铜-氧化锆复合材料，Cu#ZrO，通过在一氧化碳（CO）和氧气（O）的混合物中促进 CuZr 合金前体的纳米相分离来合成。高分辨率电子显微镜显示，该材料由可互换的 Cu 和 t-ZrO 相组成，平均厚度为 5nm。Cu#ZrO 在电化学还原二氧化碳（CO）生成甲酸（HCOOH）方面表现出增强的选择性，在相对于可逆氢电极的-0.9V 时，法拉第效率为 83.5%。原位拉曼光谱表明，Zr 位和 Cu 边界之间的双功能相互作用导致反应选择性发生变化，同时产生了大量的催化位点。
