Bismuthene for highly efficient carbon dioxide electroreduction reaction.,Nature Communications

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Bismuthene for highly efficient carbon dioxide electroreduction reaction.
Nature Communications ( IF 14.7 ) Pub Date : 2020-02-27 , DOI: 10.1038/s41467-020-14914-9
Fa Yang _{1,

2} , Ahmed O Elnabawy ₃ , Roberto Schimmenti ₃ , Ping Song ₁ , Jiawei Wang ₁ , Zhangquan Peng ₁ , Shuang Yao ₄ , Ruiping Deng ₄ , Shuyan Song ₄ , Yue Lin ₂ , Manos Mavrikakis ₃ , Weilin Xu _{1,

2}

Affiliation

Bismuth (Bi) has been known as a highly efficient electrocatalyst for CO2 reduction reaction. Stable free-standing two-dimensional Bi monolayer (Bismuthene) structures have been predicted theoretically, but never realized experimentally. Here, we show the first simple large-scale synthesis of free-standing Bismuthene, to our knowledge, and demonstrate its high electrocatalytic efficiency for formate (HCOO-) formation from CO2 reduction reaction. The catalytic performance is evident by the high Faradaic efficiency (99% at -580 mV vs. Reversible Hydrogen Electrode (RHE)), small onset overpotential (<90 mV) and high durability (no performance decay after 75 h and annealing at 400 °C). Density functional theory calculations show the structure-sensitivity of the CO2 reduction reaction over Bismuthene and thicker nanosheets, suggesting that selective formation of HCOO- indeed can proceed easily on Bismuthene (111) facet due to the unique compressive strain. This work paves the way for the extensive experimental investigation of Bismuthene in many different fields.

中文翻译：

铋用于高效二氧化碳电还原反应。

铋（Bi）被认为是一种高效的二氧化碳还原反应电催化剂。理论上已经预测了稳定的独立式二维Bi单层（Bismuthene）结构，但从未在实验上实现。在这里，据我们所知，我们展示了独立式 Bismuthene 的首次简单大规模合成，并证明了其对 CO2 还原反应形成甲酸盐 (HCOO-) 的高电催化效率。其催化性能体现在高法拉第效率（与可逆氢电极 (RHE) 相比，-580 mV 时为 99%）、起始过电势小（<90 mV）和高耐用性（75 小时和 400 ° 退火后性能无衰减） C）。密度泛函理论计算显示了 Bismuthene 和较厚纳米片上 CO2 还原反应的结构敏感性，表明由于独特的压缩应变，HCOO- 的选择性形成确实可以在 Bismuthene (111) 面上轻松进行。这项工作为铋在许多不同领域的广泛实验研究铺平了道路。

更新日期：2020-02-27

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