Rhodium–Tin Binary Nanoparticle—A Strategy to Develop an Alternative Electrocatalyst for Oxygen Reduction

Ahn, Minjeh; Young, In; Cho, Jinwon; Ham, Hyung Chul; Sung, Yung‐Eun; Yoo, Sung Jong

doi:10.1021/acscatal.7b02402

Cited by 29 publications

(23 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, non-Pt catalysts such as Pd–Rh, Au–Rh, Rh–Sn, etc. could deliver a mass-specific activity of ∼0.20 A/mg, which is far below the target value. − During the course of the present investigation, Li et al demonstrated the ORR and formic acid oxidation reaction (FAOR) activity of Pd-based trimetallic alloy catalyst at two different pHs (alkaline and acidic) . Zuo et al reported the ORR and ethanol oxidation activity of Pd-based alloy electrocatalyst in acidic and alkaline pH, respectively .…”

Section: Introductionmentioning

confidence: 74%

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Mondal

Raj

2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Synthesis of non-Pt bifunctional electrocatalyst for the anodic oxidation of liquid fuel and cathodic reduction of oxygen is of great interest in the development of energy conversion devices. We demonstrate a facile room-temperature synthesis of surface-engineered trimetallic alloy nanoelectrocatalyst based on Co, Cu, and Pd by thermodynamically favorable transmetallation reaction and electrochemical dealloying. The quasi-spherical Co x Cu y Pd z trimetallic catalysts were synthesized by the thermodynamically favorable reaction of K 2 PdCl 4 with sheetlike Co m Cu n bimetallic alloy nanostructure. The surface engineering of Co x Cu y Pd z was achieved by electrochemical dealloying. The surface-engineered alloy electrocatalyst exhibits excellent bifunctional activity toward formic acid oxidation reaction (FAOR) and oxygen reduction reaction (ORR) at same pH. The elemental composition and lattice strain control the electrocatalytic performance. The elemental composition-dependent compressive strain weakens the adsorption of oxygen-containing species and favors the facile electron transfer for FAOR and ORR. The engineered alloy electrocatalyst of Co 0.02 Cu 13.8 Pd 86.18 composition is highly durable and delivers high mass-specific activity for ORR and FAOR. It delivers mass-specific activities of 1.50 and 0.202 A/mg Pd for FAOR and ORR, respectively, in acidic pH. The overall performance is superior to that of as-synthesized Pd and dealloyed bimetallic Co 2.7 Pd 97.3 and Cu 5.61 Pd 94.39 nanoelectrocatalysts.

show abstract

Section: Introductionmentioning

confidence: 74%

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Mondal

Raj

2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Here, we first investigate whether this electron interaction also exists between SWNTs and an appropriate metal. Metallic rhodium (Rh) has a high catalytic property for many reactions, − and recent studies show the Rh-based electrocatalysts may be more active than Pt for the HER and ORR. − Therefore, with attempts to explored novel catalysts for enhanced electrocatalysis, the electronic structures and interface interaction between Rh and SWNTs were intensely evaluated. In the combination of Rh and SWNTs, SWNTs would draw the electrons to deviate from Rh by a noncovalent effect.…”

Section: Introductionmentioning

confidence: 99%

Single-Walled Carbon Nanotube Induced Optimized Electron Polarization of Rhodium Nanocrystals To Develop an Interface Catalyst for Highly Efficient Electrocatalysis

Zhang

Chen

et al. 2018

ACS Catal.

View full text Add to dashboard Cite

Carbon nanomaterials have been employed as crucial supports to increase surface loading and electronic conductivity. In addition, there are widely synergistic effects between the metallic species and the carbon supports for accelerated and stable electrocatalysis. In this work, a rhodium nanocrystal hybrid with single-walled carbon nanotubes (Rh/SWNTs) is reported to be an advanced catalyst for electrocatalytic reactions. SWNTs, as good electron acceptors, could modulate the electronic structure of Rh NPs and produce optimized electron polarization, which can give a high-performance interface catalyst. More eye catching are the excellent hydrogen evolution reaction (HER) properties in acid and alkali achieved by Rh/SWNTs with small overpotential (at 10 mA cm–2) and Tafel slope (25 mV and 20 mV dec–1 in 0.5 M H2SO4, 48 mV and 27 mV dec–1 in 1.0 M KOH, respectively). Meanwhile, such electron polarization could also improve the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) properties. The Rh/SWNTs show high efficiency in overall water splitting and an integrated zinc–air battery with a low cell voltage of 1.59 V at 10 mA cm–2 and a high open-circuit voltage of 1.42 V. This work highlights an electron polarization strategy on the interface between Rh and SWNTs to develop a high-performance multifunctional hydrogen and oxygen catalyst.

show abstract

“…The inexpensive GO-based active and stable catalysts combined with tiny Rh nanospheres (NSs) are used to moderate the cost-effectiveness of that electrocatalyst. 23 The nanocatalyst shows an important role in succeeding highly effective electrocatalysts, and it has been used to facilitate remarkable performance for splitting of water by HERs and OERs. It is used as an alternative to Pt because GO-based Rh at its nanoscale reduces the overall utilization; hence, it controls the cost.…”

Section: ■ Introductionmentioning

confidence: 99%

“…This newly designed electrocatalytic system is promising for industrial and commercial applications in the large-scale production of H 2 as a fuel via both HERs and OERs, respectively. The inexpensive GO-based active and stable catalysts combined with tiny Rh nanospheres (NSs) are used to moderate the cost-effectiveness of that electrocatalyst . The nanocatalyst shows an important role in succeeding highly effective electrocatalysts, and it has been used to facilitate remarkable performance for splitting of water by HERs and OERs.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Decorated with Rh Nanospheres for Electrocatalytic Water Splitting

Narwade

Mali

Sapner

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

In this study, we report a method for fabrication of rhodium nanoparticles decorated on graphene oxide (Rh–GO) with high coverage of active sites of Rh nanospheres (NSs) on GO. It is one of the most pivotal aspects in the development of novel systems having high electrocatalytic performance toward overall water splitting reactions and is found to be better than universally acceptable Pt-based nanoelectrodes. The synthesis of nanohybrids shows the well-dispersed Rh NSs (∼50 nm) on a few layers of graphene oxide sheets. These as-synthesized nanomaterials were confirmed by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, Brunauer–Emmett–Teller (BET) surface area measurements, thermogravimetric analysis (TGA), and X-ray diffraction (XRD) analysis. Furthermore, Rh–GO exhibits significantly improved electrochemical performance toward electrocatalytic water splitting reactions, that is, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), and it shows exceptionally an ultrasmall overpotential of 2 mV for the HER, reaching a current density of 10 mA cm–2 with a smaller Tafel slope 10 mV dec–1, and the OER overpotential reaches 0.23 V at 10 mA cm–2 with a Tafel slope of 27 mV dec–1. The reduced charge transfer resistances after Rh NSs decoration on GO which lead to simultaneous enhancement in feasibility toward interfacial electron transfer, result in an increase in activity toward overall water splitting reactions (both HER and OER).

show abstract

Rhodium–Tin Binary Nanoparticle—A Strategy to Develop an Alternative Electrocatalyst for Oxygen Reduction

Cited by 29 publications

References 53 publications

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Single-Walled Carbon Nanotube Induced Optimized Electron Polarization of Rhodium Nanocrystals To Develop an Interface Catalyst for Highly Efficient Electrocatalysis

Graphene Oxide Decorated with Rh Nanospheres for Electrocatalytic Water Splitting

Contact Info

Product

Resources

About