PEM fuel cell electrocatalysts and catalyst layers: by Xiao-Zi Yuan, Haijiang Wang (auth.), Jiujun Zhang (eds.)
By Xiao-Zi Yuan, Haijiang Wang (auth.), Jiujun Zhang (eds.)
Proton trade membrane (PEM) gasoline cells, together with H2/O2 (air) and methanol/O2 (air) gas cells, are promising fresh power changing units with excessive potency and occasional to 0 emissions. Such energy resources can be utilized in transportation, desk bound, moveable, and micro energy functions. the foremost elements of those gasoline cells are catalysts and catalyst layers.
PEM gasoline phone Electrocatalysts and Catalyst Layers covers the entire primary facets and functions of this box. the hole chapters introduce the fundamental themes on electrochemical concept and gas phone catalysis, together with: electrode thermodynamics, kinetics, and mass move; electrode/electrolyte interface electrocatalysis; electrocatalytic reactions, together with O2 reduction and H2/CH3OH oxidations; quantum chemistry simulations of catalyst task; catalyst infection; spectroscopic equipment for catalysis learn; porous gasoline electrode thought; and catalyst layers and modeling. Later chapters examine the synthesis, characterization, and task validation of PEM gas cellphone catalysts. All gasoline mobilephone comparable catalysts are reviewed, together with noble and non-noble catalysts and their preparation/performance. extra chapters describe intimately the mixing of the electrocatalyst/catalyst layers into the gas mobile, and their functionality validation, together with: catalyst layer constitution functionality and optimization, catalyst degradation and prognosis, and methods to mitigate the failure modes.
PEM gas telephone Electrocatalysts and Catalyst Layers offers a accomplished, in-depth survey of PEM gasoline phone electrocatalysts and catalyst layers, awarded through across the world popular gasoline phone scientists. Researchers and engineers within the gas telephone will locate this e-book a worthy source, as will scholars of electrochemical engineering and catalyst synthesis.
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Extra resources for PEM fuel cell electrocatalysts and catalyst layers: fundamentals and applications
Sample text
The system contains the four sub-systems explained above. Currently, complete systems such as this are available in the market. , DuPont, 3M, Johnson Matthey, WL Gore, Hydrogenics, and Plug Power [3]. 2. 1 Membrane The main function of the membrane in PEM fuel cells is to transport protons from the anode to the cathode; membrane polymers have sulfonic groups, which facilitate the transport of protons. The other functions include keeping the fuel and oxidant separated, which prevents mixing of the two gases and withstanding harsh conditions, including active catalysts, high temperatures or temperature fluctuations, strong oxidants, and reactive radicals.
For fuel cells, the times-tofailure data are always very difficult to obtain due to the prolonged test periods necessary and high costs. To reduce the experimental time, different strategies to accelerate PEM fuel cell and component degradation have been suggested. 3. 3. General accelerated test methods in PEM fuel cell lifetime analysis Component Methods Fuel cell/stack Open circuit voltage (OCV); dynamic load cycling; thermal cycling; reduced/variable humidity; fuel or oxidant contaminates; fuel or oxidant starvation Membrane OCV at reduced humidity for chemical stability; RH cycling for mechanical degradation Catalyst/catalyst layer Potential cycles; acid washing; elevated temperature; fuel or oxidant contaminates GDL Chemical oxidation in H2O2; elevated potential; low humidity Bipolar plates Press-stress; acid treatment; potential cycling; temperature cycling Sealing gasket Temperature; acid treatment; deformation/press-stress As a commercial product, the failure or reliability information of the fuel cell under typical operation conditions should be included.
107] investigated Pt-based catalysts for ethanol electrooxidation. Zhou et al. [102, 105] studied bi- and tri-metallic Ptbased catalysts with the addition of Ru, Pd, Sn and H. Wang et al. [108] developed ethanol electrooxidation catalysts on carbon-supported Pt, PtRu and Pt3Sn. Colmati 40 X-Z. Yuan and H. Wang et al. [104] also studied carbon-supported PtSn electrocatalysts. CuNi alloysupported electrocatalysts has been investigated by Gupta et al. [93, 109]. Lux and Cairns [100, 101] developed lanthanide-platinum intermetallic compounds for ethanol oxidation.