Rhodium Phosphide: A New Type of Hydrogen Oxidation Reaction Catalyst with Non‐Linear Correlated Catalytic Response to pH

Yang, Fulin; Bao, Xi; Gong, De; Su, Lixin; Cheng, Gongzhen; Chen, Shengli; Luo, Wei

doi:10.1002/celc.201900129

Cited by 27 publications

(20 citation statements)

References 38 publications

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“…[ 123 ] Chen's group investigated Rh 2 P NPs as a new type of Pt‐free HOR catalysts ( Figure a,b), with normalized exchange current densities of 0.65 mA cm −2 and 0.52 mA µg −1 , respectively, about 2.4 and 1.4 times higher than its Rh counterpart, even superior to Pt/C (Figure 5c). [ 124 ] Compared to the alkaline fuel cell, the proton exchange membrane (PEM) fuel cell possesses certain advantages such as employing commercialized PEM (Nafion film) and air as the oxidant, which appeals to more practical applications. [ 125 ] Kucernak et al demonstrated that palladium phosphides (PdP 2 , and Pd 5 P 2 ) possessed excellent HOR activity in 0.1 m HClO 4 electrolytes (Figure 5d).…”

Section: Applications In Energy‐related Electrocatalysismentioning

confidence: 99%

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Transition‐Metal Phosphides: Activity Origin, Energy‐Related Electrocatalysis Applications, and Synthetic Strategies

Liu

Amiinu

et al. 2020

Adv Funct Materials

409

194

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Developing highly efficient and stable electrocatalysts plays an important role in energy-related electrocatalysis fields. Transition-metal phosphides (TMPs) possess a series of advantages, such as high conductivity, earthabundance reserves, and good physicochemical properties, therefore arousing wide attention. In this review, the electrochemical activity origin of TMPs, allowing the rational design and construction of phosphides toward various energy-relevant reactions is first discussed. Subsequently, their unique energy-related electrocatalysis nature toward hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), hydrogen oxidation reaction (HOR), carbon dioxide reduction reaction (CO 2 RR), nitrogen reduction reaction (NRR), urea oxidation reaction (UOR), methanol oxidation reaction (MOR), and others is highlighted. Then, the TMPs' synthetic strategies are analyzed and summarized systematically. Finally, the existing key issues, countermeasures, and the future challenges of TMPs toward efficient energy-related electrocatalysis are briefly discussed.

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Section: Applications In Energy‐related Electrocatalysismentioning

confidence: 99%

Section: Applications In Energy‐related Electrocatalysismentioning

confidence: 99%

Transition‐Metal Phosphides: Activity Origin, Energy‐Related Electrocatalysis Applications, and Synthetic Strategies

Liu

Amiinu

et al. 2020

Adv Funct Materials

409

194

View full text Add to dashboard Cite

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“…DFT results reveal that the introduction of P into Rh can weaken the ∆GHad of Rh2P to nearly zero. The HOR specific and mass activities of Rh2P nanoparticles are 0.65 mA•cm −2 and 0.52 mA•μg −1 , which is 2.4 and 1.4 times higher than those of Rh/C (0.27 mA•cm −2 and 0.37 mA•μg −1 ), and even surpass the activity of Pt/C in alkaline media 125 . However, considering the element abundance and price of Rh, it is not a good choice as a HOR catalyst than other inexpensive materials.…”

Section: Other Metal Based Catalystsmentioning

confidence: 82%

Cost-Effective Hydrogen Oxidation Reaction Catalysts for Hydroxide Exchange Membrane Fuel Cells

Xue¹,

Wang²,

Zhang³

et al. 2020

Acta Physico Chimica Sinica

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Fuel cells are clean, efficient energy conversion devices that produce electricity from chemical energy stored within fuels. The development of fuel cells has significantly progressed over the past decades. Specifically, polymer electrolyte fuel cells, which are representative of proton exchange membrane fuel cells (PEMFCs), exhibit high efficiency, high power density, and quick start-up times. However, the high cost of PEMFCs, partially from the Pt-based catalysts they employ, hinders their diverse applicability. Hydroxide exchange membrane fuel cells (HEMFCs), which are also known as alkaline polymer electrolyte fuel cells (APEFCs), alkaline anionexchange membrane fuel cells (AAEMFCs), anion exchange membrane fuel cells (AEMFCs), or alkaline membrane fuel cells (AMFCs), have attracted much attention because of their capability to use non-Pt electrocatalysts and inexpensive bipolar plates. The HEMFCs are structurally similar to PEMFCs but they use a polymer electrolyte that conducts hydroxide ions, thus providing an alkaline environment. However, the relatively sluggish kinetics of the hydrogen oxidation reaction (HOR) inhibit the practical application of HEMFCs. The anode catalyst loading needed for HEMFCs to achieve high cell performance is larger than that required for other fuel cells, which substantially increases the cost of HEMFCs. Therefore, low-cost, highly active, and stable HOR catalysts in the alkaline condition are greatly desired. Here, we review the recent achievements in developing such HOR catalysts. First, plausible HOR mechanisms are explored and HOR activity descriptors are summarized. The HOR processes are mainly controlled by the binding energy between hydrogen and the catalysts, but they may also be influenced by OH adsorption, interfacial water adsorption, and the potential of zero (free) charge. Next, experimental methods used to elevate HOR activities are introduced, followed by HOR catalysts reported in the literature, including Pt-, Ir-, Pd-, Ru-, and Ni-based catalysts, among others. HEMFC performances when employing various anode catalysts are then summarized, where HOR catalysts with platinum-group metals exhibited the highest HEMFC performance. Although the Ni-based HOR catalyst activity was higher than those of other non-precious metalbased catalysts, they showed unsatisfactory performance in HEMFCs. We further analyzed HEMFC performances while considering anode catalyst cost, where we found that this cost can be reduced by using recently developed, non-Pt HOR catalysts, especially Ru-based catalysts. In fact, an HEMFC using a Ru-based HOR catalyst showed an anode catalyst cost-based performance similar to that of PEMFCs, making the HEMFC promising for use in practical applications. Finally, we proposed routes for developing future HOR catalysts for HEMFCs.

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“…While cobalt phosphide 7,17,18,21,22 and rhodium phosphide [23][24][25][26][27][28][29] catalysts have both been the subject of active study in recent literature, the catalytic properties [30][31][32][33] of iridium phosphides have been less explored outside of structural and physical studies over the last half century, [34][35][36][37][38][39][40][41][42][43][44][45] in part due to their difficult syntheses. 46 This is in spite of the fact that, given the similarity often observed in the behavior of metal phosphides to their metal analogues, iridium-derived catalysts have often been found to be exceptional catalysts for reactions of great industrial value 47, 48 such as alkane dehydrogenation.…”

Section: -20mentioning

confidence: 99%

In Situ Formation of a Sub-Nanometer Iridium Phosphide Catalyst from Supported Organometallic Species

Sheludko

Wegener

Çelik

et al. 2020

Preprint

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While several metal phosphides have attracted significant attention in the last several years due to their potential use as photocatalytic and hydrotreating catalysts, iridium phosphide has remained largely unexplored. In this work, silica-supported pincer-iridium species are thermolyzed, resulting in deconstruction of the tridentate ligand precursor and formation of a sub-nanometer iridium phosphide phase characterized by 31P magic angle spinning nuclear magnetic resonance (31P-MAS-NMR), X-ray absorption spectroscopy (XAS), and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). The support material was found to play an active role in determining the product of the surface thermolysis, with the silica supported material generating phosphorus rich iridium phosphide nanoparticles. The resulting silica-supported iridium phosphide phase is explored as a thermocatalyst for non-oxidative butane dehydrogenation, achieving high initial reaction rates up to 900 molbutenes molcatalyst-1 hr-1 and a terminal olefin selectivity of up to 70 %.

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Rhodium Phosphide: A New Type of Hydrogen Oxidation Reaction Catalyst with Non‐Linear Correlated Catalytic Response to pH

Cited by 27 publications

References 38 publications

Transition‐Metal Phosphides: Activity Origin, Energy‐Related Electrocatalysis Applications, and Synthetic Strategies

Transition‐Metal Phosphides: Activity Origin, Energy‐Related Electrocatalysis Applications, and Synthetic Strategies

Cost-Effective Hydrogen Oxidation Reaction Catalysts for Hydroxide Exchange Membrane Fuel Cells

In Situ Formation of a Sub-Nanometer Iridium Phosphide Catalyst from Supported Organometallic Species

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