TY - JOUR
T1 - A Porphyrinic Zirconium Metal-Organic Framework for Oxygen Reduction Reaction
T2 - Tailoring the Spacing between Active-Sites through Chain-Based Inorganic Building Units
AU - Cichocka, Magdalena Ola
AU - Liang, Zuozhong
AU - Feng, Dawei
AU - Back, Seoin
AU - Siahrostami, Samira
AU - Wang, Xia
AU - Samperisi, Laura
AU - Sun, Yujia
AU - Xu, Hongyi
AU - Hedin, Niklas
AU - Zheng, Haoquan
AU - Zou, Xiaodong
AU - Zhou, Hong Cai
AU - Huang, Zhehao
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/9/9
Y1 - 2020/9/9
N2 - The oxygen reduction reaction (ORR) is central in carbon-neutral energy devices. While platinum group materials have shown high activities for ORR, their practical uses are hampered by concerns over deactivation, slow kinetics, exorbitant cost, and scarce nature reserve. The low cost yet high tunability of metal-organic frameworks (MOFs) provide a unique platform for tailoring their characteristic properties as new electrocatalysts. Herein, we report a new concept of design and present stable Zr-chain-based MOFs as efficient electrocatalysts for ORR. The strategy is based on using Zr-chains to promote high chemical and redox stability and, more importantly, tailor the immobilization and packing of redox active-sites at a density that is ideal to improve the reaction kinetics. The obtained new electrocatalyst, PCN-226, thereby shows high ORR activity. We further demonstrate PCN-226 as a promising electrode material for practical applications in rechargeable Zn-air batteries, with a high peak power density of 133 mW cm-2. Being one of the very few electrocatalytic MOFs for ORR, this work provides a new concept by designing chain-based structures to enrich the diversity of efficient electrocatalysts and MOFs.
AB - The oxygen reduction reaction (ORR) is central in carbon-neutral energy devices. While platinum group materials have shown high activities for ORR, their practical uses are hampered by concerns over deactivation, slow kinetics, exorbitant cost, and scarce nature reserve. The low cost yet high tunability of metal-organic frameworks (MOFs) provide a unique platform for tailoring their characteristic properties as new electrocatalysts. Herein, we report a new concept of design and present stable Zr-chain-based MOFs as efficient electrocatalysts for ORR. The strategy is based on using Zr-chains to promote high chemical and redox stability and, more importantly, tailor the immobilization and packing of redox active-sites at a density that is ideal to improve the reaction kinetics. The obtained new electrocatalyst, PCN-226, thereby shows high ORR activity. We further demonstrate PCN-226 as a promising electrode material for practical applications in rechargeable Zn-air batteries, with a high peak power density of 133 mW cm-2. Being one of the very few electrocatalytic MOFs for ORR, this work provides a new concept by designing chain-based structures to enrich the diversity of efficient electrocatalysts and MOFs.
UR - http://www.scopus.com/inward/record.url?scp=85090870089&partnerID=8YFLogxK
U2 - 10.1021/jacs.0c06329
DO - 10.1021/jacs.0c06329
M3 - Article
C2 - 32786758
AN - SCOPUS:85090870089
SN - 0002-7863
VL - 142
SP - 15386
EP - 15395
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 36
ER -