Improving the bulk gas transport of Fe-N-C platinum group metal-free nanofiber electrodes via electrospinning for fuel cell applications
Sadia Kabir,Samantha Medina,Guanxiong Wang,Guido Bender,Svitlana Pylypenko,Svitlana Pylypenko,Kenneth C. Neyerlin +6 more
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TLDR
In this article, PGM-free nanofiber electrode mats, prepared by electrospinning a mixture of pyrolyzed Fe-N-C catalyst, Nafion ionomer and a carrier polymer Poly Acrylic acid (PAA), were compared to traditionally prepared electrodes.About:
This article is published in Nano Energy.The article was published on 2020-04-11 and is currently open access. It has received 40 citations till now. The article focuses on the topics: Cyclic voltammetry & Electrocatalyst.read more
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Journal ArticleDOI
Single Cobalt Sites Dispersed in Hierarchically Porous Nanofiber Networks for Durable and High-Power PGM-Free Cathodes in Fuel Cells.
Yanghua He,Hui Guo,Sooyeon Hwang,Xiaoxuan Yang,Zizhou He,Jonathan Braaten,Stavros Karakalos,Weitao Shan,Maoyu Wang,Hua Zhou,Zhenxing Feng,Karren L. More,Guofeng Wang,Dong Su,David A. Cullen,Ling Fei,Shawn Litster,Gang Wu +17 more
TL;DR: The combination of the intrinsic activity and stability of single Co sites, along with unique catalyst architecture, provide new insight into designing efficient PGM-free electrodes with improved performance and durability.
Journal ArticleDOI
Recent Advances in Electrocatalysts for Proton Exchange Membrane Fuel Cells and Alkaline Membrane Fuel Cells.
Fei Xiao,Yu-Cheng Wang,Zhi-Peng Wu,Guang-yu Chen,Fei Yang,Shangqian Zhu,Kumar Siddharth,Zhijie Kong,Aolin Lu,Jin-Cheng Li,Chuan-Jian Zhong,Zhi-You Zhou,Minhua Shao +12 more
TL;DR: In this paper, the performance of different types of electrocatalysts for both oxygen reduction reaction and hydrogen oxidation reaction are compared and the further development of active, stable, and low-cost electrocatalyst to meet the ultimate commercialization of PEMFCs and AMFCs is discussed.
Journal ArticleDOI
Pyrolyzed M–Nx catalysts for oxygen reduction reaction: progress and prospects
Ergui Luo,Ergui Luo,Yuyi Chu,Yuyi Chu,Jie Liu,Jie Liu,Zhaoping Shi,Zhaoping Shi,Siyuan Zhu,Siyuan Zhu,Liyuan Gong,Liyuan Gong,Junjie Ge,Junjie Ge,Chang Hyuck Choi,Changpeng Liu,Changpeng Liu,Wei Xing,Wei Xing +18 more
TL;DR: In this paper, a comprehensive overview of the fundamental chemistry of oxygen reduction reaction (ORR) and the progress of the M-Nx/C catalysts is presented, highlighting the indispensable role of advanced characterization tools.
Journal ArticleDOI
Status and challenges for the application of platinum group metal-free catalysts in proton-exchange membrane fuel cells
Luigi Osmieri,Jaehyung Park,David A. Cullen,Piotr Zelenay,Deborah J. Myers,Kenneth C. Neyerlin +5 more
TL;DR: In this paper, the progress made in activity over the last decade is reviewed, along with synthesis strategies for more controlled active site formation and performance gains achieved through electrode engineering, increased focus on durability, the growing understanding of degradation mechanisms, and the need for standard performance and accelerated stress test protocols are discussed.
Journal ArticleDOI
Evolution of atomic-scale dispersion of FeNx in hierarchically porous 3D air electrode to boost the interfacial electrocatalysis of oxygen reduction in PEMFC
Xiaogang Fu,Xiaogang Fu,Rui Gao,Gaopeng Jiang,Matthew Li,Shuang Li,Dan Luo,Yongfeng Hu,Qingxi Yuan,Wanxia Huang,Ning Zhu,Lin Yang,Zhiyu Mao,Xiong Junwei,Aiping Yu,Zhongwei Chen,Zhengyu Bai +16 more
TL;DR: In this article, a new ZIF8-derived Fe-N-C catalyst/electrode design combining local chemistry tuning and primary morphology tailoring was proposed to address the above two critical issues, which can significantly increase the intrinsic catalytic activity, facilitate bulk mass transport, and generate more effective triple phase interfaces for ORR.
References
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Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
TL;DR: In this article, the authors quantified the activities and voltage loss modes for state-of-the-art MEAs (membrane electrode assemblies), specifies performance goals needed for automotive application, and provides benchmark oxygen reduction activities for state of the art platinum electrocatalysts.
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Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
Vojislav R. Stamenkovic,Vojislav R. Stamenkovic,Ben Fowler,Bongjin Simon Mun,Guofeng Wang,Philip N. Ross,Chris Lucas,Nenad M. Markovic +7 more
TL;DR: It is demonstrated that the Pt3Ni( 111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-foldMore active than the current state-of-the-art Pt/C catalysts for PEMFC.
Journal ArticleDOI
Highly Crystalline Multimetallic Nanoframes with Three-Dimensional Electrocatalytic Surfaces
Chen Chen,Yijin Kang,Ziyang Huo,Ziyang Huo,Zhongwei Zhu,Zhongwei Zhu,Wenyu Huang,Wenyu Huang,Huolin L. Xin,Joshua Snyder,Dongguo Li,Jeffrey A. Herron,Manos Mavrikakis,Miaofang Chi,Karren L. More,Yadong Li,Nenad M. Markovic,Gabor A. Somorjai,Gabor A. Somorjai,Peidong Yang,Vojislav R. Stamenkovic +20 more
TL;DR: A highly active and durable class of electrocatalysts is synthesized by exploiting the structural evolution of platinum-nickel (Pt-Ni) bimetallic nanocrystals by exploitingThe starting material, crystalline PtNi3 polyhedra, transforms in solution by interior erosion into Pt3Ni nanoframes with surfaces that offer three-dimensional molecular accessibility.
Journal ArticleDOI
A class of non-precious metal composite catalysts for fuel cells
Rajesh Bashyam,Piotr Zelenay +1 more
TL;DR: The results of this study show that heteroatomic polymers can be used not only to stabilize the non-precious metal in the acidic environment of the PEFC cathode but also to generate active sites for oxygen reduction reaction.
Journal ArticleDOI
A review on non-precious metal electrocatalysts for PEM fuel cells
TL;DR: In this paper, the authors highlight the progress made over the past 40 years with a detailed discussion of recent works in the area of non-precious metal electrocatalysts for oxygen reduction reaction, a necessary reaction at the PEM fuel cell cathode.