Non-precious metal electrocatalysts with high activity for hydrogen oxidation reaction in alkaline electrolytes

Sheng, Wenchao; Bivens, Adam P.; Myint, MyatNoeZin; Zhuang, Zhongbin; Forest, Robert V.; Fang, Qianrong; Chen, Jingguang G.; Yan, Yushan

doi:10.1039/c3ee43899f

Cited by 341 publications

(335 citation statements)

References 36 publications

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“…To further improve the catalytic activity, Yan and co-authors [98] electrochemically deposited NiCoMo on Au substrates. They showed that the optimal composition of Co 0.12 Ni 5.1 Mo produced a high exchange current density of 0.015 mA cm −2 .…”

Section: Science China Materialsmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

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150

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Section: Science China Materialsmentioning

confidence: 99%

Electrocatalysts for hydrogen oxidation and evolution reactions

Zhuang

2016

Sci. China Mater.

Self Cite

150

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“…4 On the other hand, AMFCs allow the use of non PGMs catalysts in the less aggressive medium (alkaline, pH = 13) where most of the transition metals form stable solid species. 5 Therefore, the combination of a very low content of active PGM with a low-cost transition metal is very appealing as HOR catalyst in AMFCs. As a typical example, the use of a low amount of Pd, which is a relatively abundant PGM, in combination with abundant transition metals like Ni is very attractive for HOR in alkaline medium.…”

Section: Introductionmentioning

confidence: 99%

Pd/Ni Synergestic Activity for Hydrogen Oxidation Reaction in Alkaline Conditions

Bakos

Paszternák

Zitoun

2015

Electrochimica Acta

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The investigation of hydrogen oxidation reaction (HOR) in alkaline conditions has been the subject of a wide interest in the past few years with the rise of alkaline membrane fuel cells (AMFCs). In particular, the quest for the lowest content of platinum group metals (PGMs) in the HOR catalyst is ongoing. In this article, we propose the use of a nanoscale Pd layer partially covering a Ni film to provide the most efficient use of the PGM in the HOR catalyst. The Pd/Ni electrodes were prepared by spontaneous and electrolytic deposition of Pd onto smooth polycrystalline Ni surfaces with different surface compositions. The electrodes were characterized by cyclic voltammetry and atomic force microscopy. Electrocatalytic activity in HOR of the Pd/Ni electrodes was measured in alkaline solution by rotating disc electrode method. In the manuscript, we demonstrate that a Pd coverage as low as 1.5% vs. Ni coverage is sufficient to provide a high current density compared to pure Ni. The current density linearly increases with the Pd coverage up to a Pd coverage of 17%; upon further increase in the Pd coverage, the current density reaches a plateau, i.e. the diffusion limit for the HOR process.The comparison with Pd supported on carbon shows the clear benefit for the bimetallic catalyst.

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“…Unfortunately, recent studies have shown that the HOR/HER rates of noble metal electrodes in the alkaline environment are much slower than in acidic electrolytes by about two orders of magnitude, 18,19 but still remain a few order of magnitude higher than the latest noble metal free HOR catalyst systems. [20][21][22] Even if the reasons for this activity decrease on noble metal electrodes remain not yet fully understood, these studies have highlighted the lack of fundamental understanding * Electrochemical Society Student Member.…”

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confidence: 99%

Hydrogen Oxidation and Evolution Reaction Kinetics on Carbon Supported Pt, Ir, Rh, and Pd Electrocatalysts in Acidic Media

Durst

Simon

Hasché

et al. 2014

J. Electrochem. Soc.

460

459

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The hydrogen oxidation and evolution reaction (HOR/HER) behavior of carbon supported metal (Pt, Ir, Rh, Pd) nanoparticle electrocatalysts is studied using the H 2 pump approach, in a proton exchange membrane fuel cell (PEMFC) setup. After describing the best method for normalizing the net faradaic currents to the active surface area of the electrodes, we measure the HOR/HER kinetic parameters (exchange current densities and transfer coefficients) in a temperature range from 313 K to 353 K and calculate the activation energy for the HOR/HER process. We compare the measured kinetic parameters with those extracted from different mass-transport limitation free setups in literature, to evaluate the hydrogen electrocatalysis on these most active surfaces. The HOR/HER activity scales with the following: Pt > Ir Rh > Pd. The anodic and cathodic transfer coefficients are similar for all metals (ca. 0.5), leading to Tafel In the current view of energy conversion based on the use of fuel cells and electrolyzers, the hydrogen electrocatalysis plays a central role. H 2 is used as a fuel in proton exchange membrane fuel cells (PEMFCs), where it is electrochemically oxidized at the anode electrode according to:In PEMFC anode electrode, only small amounts of Pt (ca. 0.05 mg Pt /cm 2 geo ) are required to catalyze the hydrogen oxidation, without contributing to any efficiency loss of the overall fuel cell performance.1 The same would hold true for the hydrogen evolution reaction -HER -at the cathode side of water electrolyzer systems. Moreover, except when considering contamination issues e.g. due to the presence of CO in reformate hydrogen, or stability issues e.g. due to hydrogen starvation events mode, a replacement of the current carbon supported platinum (Pt/C) based electrode technology is not contemplated in PEMFC. 2 The drawback of both PEM-based fuel cells and electrolyzer systems arise from the large amounts of noble metal (ca. ≈0.4 mg metal /cm 2 geo ) required to catalyze at acceptable rates the sluggish oxygen reduction reaction (ORR) in fuel cell cathodes, and the oxygen evolution reaction (OER) in electrolyzer anodes. [3][4][5] Contrary to the acidic PEM-based technologies, anion exchange membrane (AEM) based devices, [6][7][8] which are operating at high pH, offer the use of cost-effective non-noble metal electrodes to catalyze the ORR 9,10 and OER 11-13 at almost similar rates than on noble metal electrodes in acidic electrolytes. As a result, a replacement of PEMbased devices by AEM ones will be advantageous 14 if and only if AEM conductivities will be further increased to the level of PEM, 15,16 and their sensitivity to CO 2 significantly reduced. 17 However, getting rid of the noble metal contents in AEM-device electrodes would be feasible only in the case of similar hydrogen oxidation and evolution reaction (HOR/HER) rates in AEMs versus PEM-based conversion devices. Unfortunately, recent studies have shown that the HOR/HER rates of noble metal electrodes in the alkaline environment are much slower than in ...

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Non-precious metal electrocatalysts with high activity for hydrogen oxidation reaction in alkaline electrolytes

Abstract: Polarization curves of hydrogen oxidation on a Pt disk, electroplated Ni and CoNiMo multimetallic layer.

Cited by 341 publications

References 36 publications

Electrocatalysts for hydrogen oxidation and evolution reactions

Electrocatalysts for hydrogen oxidation and evolution reactions

Pd/Ni Synergestic Activity for Hydrogen Oxidation Reaction in Alkaline Conditions

Hydrogen Oxidation and Evolution Reaction Kinetics on Carbon Supported Pt, Ir, Rh, and Pd Electrocatalysts in Acidic Media

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