Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO2 reduction†,Journal of Materials Chemistry A

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Partial sulfuration-induced defect and interface tailoring on bismuth oxide for promoting electrocatalytic CO2 reduction†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-12-18 , DOI: 10.1039/c9ta11363k
Xuxiao Yang _{1,

2,

3,

4,

5} , Peilin Deng _{6,

7,

8,

9,

10} , Dongyu Liu _{4,

5,

11,

12,

13} , Shuang Zhao _{1,

2,

3,

4,

5} , Dan Li _{1,

2,

3,

4,

5} , Hu Wu _{1,

2,

3,

4,

5} , Yaming Ma _{1,

2,

3,

4,

5} , Bao Yu Xia _{6,

7,

8,

9,

10} , Mingtao Li _{4,

5,

11,

12,

13} , Chunhui Xiao _{1,

2,

3,

4,

5} , Shujiang Ding _{1,

2,

3,

4,

5}

Affiliation

Defect and interface engineering is a powerful strategy to tune the electronic structure and adsorption behavior of electrocatalysts, boosting the performance of the electrocatalytic CO₂ reduction reaction (eCO₂RR). Herein, we construct a hybrid electrocatalyst, Bi₂S₃–Bi₂O₃@rGO, with a large amount of defects (oxygen vacancies etc.) and a specific interface between bismuth sulfide (Bi₂S₃) and bismuth oxide (Bi₂O₃) by a partial precipitation conversion method. Both experimental results and theoretical calculations reveal that the Bi₂S₃–Bi₂O₃ interface drastically lowers the formation energy of HCOO*, in favor of the production of formate (HCOOH) over CO, promoting the conversion of CO₂ to HCOOH. The as-prepared electrocatalyst shows excellent electrocatalytic activity to generate HCOOH with a high faradaic efficiency of over 90% and a low overpotential of 700 mV, as well as excellent durability for more than 24 h.

中文翻译：

局部硫化引起的缺陷和氧化铋的界面修整促进电催化CO ₂还原†

缺陷和界面工程是调节电子催化剂的电子结构和吸附行为，提高电催化CO ₂还原反应（eCO ₂ RR）性能的有力策略。本文中，我们构建了一种混合电催化剂Bi ₂ S ₃ –Bi ₂ O ₃ @rGO，该催化剂具有大量缺陷（氧空位等），并且在硫化铋（Bi ₂ S ₃）和氧化铋（Bi）之间具有特定的界面。₂ O ₃）通过部分沉淀转化法。实验结果和理论计算均表明Bi ₂S ₃ -Bi ₂ O ₃界面极大地降低了HCOO *的形成能，有利于甲酸（HCOOH）的生成，而不是CO的生成，从而促进了CO ₂向HCOOH的转化。所制备的电催化剂显示出优异的电催化活性，可产生HCOOH，其法拉第效率高达90％以上，低过电位为700 mV，并具有超过24小时的出色耐久性。

更新日期：2020-01-10

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