Efficient CO₂ Reduction to Formate on CsPbI₃ Nanocrystals Wrapped with Reduced Graphene Oxide.

Content Provider	Europe PMC
Author	Hoang, Minh Tam Han, Chen Ma, Zhipeng Mao, Xin Yang, Yang Madani, Sepideh Sadat Shaw, Paul Yang, Yongchao Peng, Lingyi Toe, Cui Ying Pan, Jian Amal, Rose Du, Aijun Tesfamichael, Tuquabo Han, Zhaojun Wang, Hongxia
Abstract	HighlightsA rational design of metal halide perovskites for achieving efficient CO2 reduction reaction was demonstrated.The stability of CsPbI3 perovskite nanocrystal (NCs) in aqueous electrolyte was improved by compositing with reduced graphene oxide (rGO).The CsPbI3/rGO catalyst exhibited > 92% Faradaic efficiency toward formate production with high current density which was associated with the synergistic effects between the CsPbI3 NCs and rGO. AbstractTransformation of greenhouse gas (CO2) into valuable chemicals and fuels is a promising route to address the global issues of climate change and the energy crisis. Metal halide perovskite catalysts have shown their potential in promoting CO2 reduction reaction (CO2RR), however, their low phase stability has limited their application perspective. Herein, we present a reduced graphene oxide (rGO) wrapped CsPbI3 perovskite nanocrystal (NC) CO2RR catalyst (CsPbI3/rGO), demonstrating enhanced stability in the aqueous electrolyte. The CsPbI3/rGO catalyst exhibited > 92% Faradaic efficiency toward formate production at a CO2RR current density of ~ 12.7 mA cm−2. Comprehensive characterizations revealed the superior performance of the CsPbI3/rGO catalyst originated from the synergistic effects between the CsPbI3 NCs and rGO, i.e., rGO stabilized the α-CsPbI3 phase and tuned the charge distribution, thus lowered the energy barrier for the protonation process and the formation of *HCOO intermediate, which resulted in high CO2RR selectivity toward formate. This work shows a promising strategy to rationally design robust metal halide perovskites for achieving efficient CO2RR toward valuable fuels.Supplementary InformationThe online version contains supplementary material available at 10.1007/s40820-023-01132-3.
ISSN	23116706
Journal	Nano-Micro Letters
Volume Number	15
PubMed Central reference number	PMC10310658
Issue Number	1
PubMed reference number	37386207
e-ISSN	21505551
DOI	10.1007/s40820-023-01132-3
Language	English
Publisher	Springer Nature Singapore
Publisher Date	2023-06-29
Publisher Place	Singapore
Access Restriction	Open
Rights License	Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2023
Subject Keyword	Perovskite nanocrystal Electrocatalyst Inorganic perovskite CO2 reduction Formate production
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Surfaces, Coatings and Films Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering