A framework ensemble facilitates high Pt utilization in a low Pt loading fuel cell

2021 ◽  
Vol 11 (8) ◽  
pp. 2957-2963
Author(s):  
Jian Wang ◽  
Guangping Wu ◽  
Wenhui Xuan ◽  
Lishan Peng ◽  
Yong Feng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Phase Field ◽  
Active Sites ◽  
Catalyst Layer ◽  
Three Phase ◽  
Pt Utilization ◽  
The Cross ◽  
Low Pt Loading ◽  
Effective Transfer

Rationally designing the structure of catalyst layer in MEA to achieve the dispersion of active sites at the cross of three-phase field and the effective transfer network paths for protons through catalysts and catalyst layer.

scholarly journals Intermetallic Platinum Alloy Nanoparticles and Single Atoms Hybrid Electrocatalysts for Proton Exchange Membrane Fuel Cells

2021 ◽  
Author(s):  
Minhua Shao ◽  
Fei Xiao ◽  
Qi Wang ◽  
Gui-Liang Xu ◽  
Xueping Qin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Sites ◽  
Proton Exchange Membrane ◽  
Synergistic Effects ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Alloy Nanoparticles ◽  
Single Atoms ◽  
Low Pt Loading ◽  
Exchange Membrane

Abstract Proton exchange membrane fuel cell converts hydrogen and oxygen into electricity with zero emission1. The high cost and low durability of Pt-based electrocatalysts for oxygen reduction reaction hinder its wide applications2,3. The development of non-precious metal electrocatalysts also reaches the bottleneck because of the low activity and durability4,5. Here we rationally design a hybrid electrocatalyst consisting of atomically dispersed Pt and Fe single atoms and intermetallic PtFe alloy nanoparticles. The Pt mass activity of the hybrid catalyst is 3.5 times higher than that of commercial Pt/C in a fuel cell. More importantly, the fuel cell with an ultra-low Pt loading in the cathode (0.015 mgPt cm-2) shows unprecedented durability, with 93.6% activity retention after 100,000 cycles and no noticeable current drop at 0.6 V for at least 206 h. These results highlight the importance of the synergistic effects among active sites in hybrid electrocatalysts and provide an alternative way to design more active and durable low-Pt electrocatalysts for electrochemical devices.

scholarly journals Improved Pt-utilization efficiency of low Pt-loading PEM fuel cell electrodes using direct membrane deposition

2015 ◽  
Vol 60 ◽  
pp. 168-171 ◽  
Author(s):  
Matthias Breitwieser ◽  
Matthias Klingele ◽  
Benjamin Britton ◽  
Steven Holdcroft ◽  
Roland Zengerle ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Utilization Efficiency ◽  
Fuel Cell Electrodes ◽  
Pt Utilization ◽  
Low Pt Loading

scholarly journals Correction: A framework ensemble facilitates high Pt utilization in a low Pt loading fuel cell

2021 ◽  
Vol 11 (8) ◽  
pp. 2964-2964
Author(s):  
Jian Wang ◽  
Guangping Wu ◽  
Wenhui Xuan ◽  
Lishan Peng ◽  
Yong Feng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Pt Utilization ◽  
Low Pt Loading

Correction for ‘A framework ensemble facilitates high Pt utilization in a low Pt loading fuel cell’ by Jian Wang et al., Catal. Sci. Technol., 2021, DOI: 10.1039/d1cy00028d.

Nano-scale control of the ionomer distribution by molecular masking of the Pt surface in PEMFCs

2020 ◽  
Vol 8 (26) ◽  
pp. 13004-13013 ◽  
Author(s):  
Gisu Doo ◽  
Seongmin Yuk ◽  
Ji Hye Lee ◽  
Sungyu Choi ◽  
Dong-Hyun Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Pt Catalyst ◽  
Phase Boundaries ◽  
Electrolyte Membrane ◽  
Three Phase ◽  
New Strategy ◽  
Scale Control

A new strategy for controlling the ionomer distribution in the catalyst layer of a polymer electrolyte membrane fuel cell, the molecular masking of Pt catalyst particles, is presented to achieve efficient three phase boundaries for the ORR.

scholarly journals N, S and Transition-Metal Co-Doped Graphene Nanocomposites as High-Performance Catalyst for Glucose Oxidation in a Direct Glucose Alkaline Fuel Cell

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 202
Author(s):  
Yexin Dai ◽  
Jie Ding ◽  
Jingyu Li ◽  
Yang Li ◽  
Yanping Zong ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Sites ◽  
High Performance ◽  
Glucose Oxidation ◽  
Alkaline Fuel Cell ◽  
Blank Group ◽  
Graphene Nanocomposites ◽  
Doped Graphene ◽  
One Step ◽  
Hydrothermal Approach

In this work, reduced graphene oxide (rGO) nanocomposites doped with nitrogen (N), sulfur (S) and transitional metal (Ni, Co, Fe) were synthesized by using a simple one-step in-situ hydrothermal approach. Electrochemical characterization showed that rGO-NS-Ni was the most prominent catalyst for glucose oxidation. The current density of the direct glucose alkaline fuel cell (DGAFC) with rGO-NS-Ni as the anode catalyst reached 148.0 mA/cm2, which was 40.82% higher than the blank group. The DGAFC exhibited a maximum power density of 48 W/m2, which was more than 2.08 folds than that of blank group. The catalyst was further characterized by SEM, XPS and Raman. It was speculated that the boosted performance was due to the synergistic effect of N, S-doped rGO and the metallic redox couples, (Ni2+/Ni3+, Co2+/Co3+ and Fe2+/Fe3+), which created more active sites and accelerated electron transfer. This research can provide insights for the development of environmental benign catalysts and promote the application of the DGAFCs.

Ice Formation and Current Distribution in the Catalyst Layer of PEM Fuel Cell at Cold Start

2019 ◽  
Vol 41 (1) ◽  
pp. 733-740 ◽  
Author(s):  
Ryosuke Ichikawa ◽  
Yutaka Tabe ◽  
Takemi Chikahisa
Keyword(s):  
Fuel Cell ◽  
Current Distribution ◽  
Catalyst Layer ◽  
Cold Start ◽  
Pem Fuel Cell ◽  
Ice Formation
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