Electrochemical Synthesis, Voltammetric Behavior, and Electrocatalytic Activity of Pd Nanoparticles

Pan, Wei; Zhang, Xiaokai; Ma, Houyi; Zhang, Jintao

doi:10.1021/jp710092z

Cited by 142 publications

(106 citation statements)

References 40 publications

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“…The current densities for the Pd catalysts were normalized by ECASA. [ 38 ] The catalyst suspension inks were prepared by mixing 2 mg np-PdNi or np-Pd samples and 2 mg carbon black (Vulcan XC-72R, Cabot) into 5 mL aqueous solution containing isopropanol and Nafi on, and followed by sonicating for 20 min. The as-prepared catalyst inks were drop-cast onto a 6-mm-diameter glassy carbon electrode served as the working electrode and then dried for 30 min before measurements.…”

Section: Methodsmentioning

confidence: 99%

Nanoporous PdNi Bimetallic Catalyst with Enhanced Electrocatalytic Performances for Electro-oxidation and Oxygen Reduction Reactions

et al. 2011

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A nanoporous PdNi (np‐PdNi) bimetallic catalyst fabricated by electrochemically dealloying a Pd20Ni80 alloy in an acid solution is reported. Residual Ni in the nanoporous alloy can be controlled by tuning dealloying potentials and the electrocatalysis of the np‐PdNi shows evident dependence on Ni concentrations. With ∼9 at.% Ni, the np‐PdNi bimetallic catalyst presents superior electrocatalytic performances in methanol and formic acid electro‐oxidation as well as oxygen reduction in comparison with commercial Pd/C and nanoporous Pd (np‐Pd). The excellent electrocatalytic properties of the dealloyed np‐PdNi bimetallic catalyst appear to arise from the combined effect of unique bicontinuous nanoporosity and bimetallic synergistic action.

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Section: Methodsmentioning

confidence: 99%

Nanoporous PdNi Bimetallic Catalyst with Enhanced Electrocatalytic Performances for Electro-oxidation and Oxygen Reduction Reactions

et al. 2011

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“…Apart from this, H 2 generated at the cathode by water electrolysis during the electrochemical process was considered to reduce the efficiency and consumed the energy [25]. Recent studies have shown that H 2 produced at the cathode can be delivered for palladium (Pd)-catalytic hydrodechlorination of contaminants, thus providing an alternative to reduce the dependence on costly electrode materials [26,27]. For example, Bonin et al exhibited that Pd-modified cathodes had high dechlorination efficiencies for chlorinated organics, as Pd can activate H 2 as well as catalyze the electrochemical reduction of H + or H 2 O to produce continuously adsorbed nascent H* [28,29].…”

Section: Bromate (Bromentioning

confidence: 99%

Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism

Mao

Zhao

2014

Electrochimica Acta

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a b s t r a c tThe electroreduction of bromate (BrO 3 − ) was investigated at a Pd modified carbon fiber (Pd/C) electrode prepared from PdCl 2 via electrodeposition method. Pd particles distributed on the carbon fiber substrate uniformly. Under various cathode potentials, electroreduction removal of BrO 3 − at pure carbon fiber electrode and the Pd/C electrode were firstly compared. It was observed that nearly no BrO 3 − removal was observed within the bias potential of -2.0 V at the carbon fiber electrode. At the Pd/C electrode, the removal efficiency of BrO 3 − was sharply increased from 24.0% to 58.4% at the cathode potential of -1.0 to -1.5 V, which was further increased to be 87.2% at -2.0 V. The electrochemical reduction of BrO 3 − was strongly pH-dependent at -0.5 V and the reduction rate could be enhanced at low pH. While at the potential of -2.0 V, a slight pH effect was observed. BrO 3 − electroreduction follows pseudo first-order kinetics; the rate constant k was firstly increased from 0.016 to 0.031 min −1 with the increase of the Pd loading amount from 0.31 to 0.73 mg/cm 2 , and then was decreased to 0.018 min −1 at a higher Pd loading amount of 1.05 mg/cm 2 . The Pd(0) nanoparticles played a significant role in forming atomic H* to realize indirect BrO 3 − reduction. The electrochemical reduction of BrO 3 − produces accumulated intermediates of HOBr and OBr − , which were subsequently reduced to Br − with the time evolution.

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“…Usually, we utilized the oxygen adsorption method to evaluate electrochemical active surface areas of metals showing well-developed regions for oxide monolayer formation and reduction [23], such as Au and Pd. So, we estimated from the charge needed to form surface oxide monolayer that the conversion factor is 424 μC cm −2 [5,24]. The reduction charge of Pd surface oxide is integrated to be 403.0, 158.32, 50.08, and 114.1 μC from S A to S D .…”

Section: Preparation Of Pd Nanostructures and Electrocatalysismentioning

confidence: 99%

“…Among these various practical applications, catalysis such as electrochemical oxidation of methanol [5] and formic acid (FA) [6], precatalysis for Heck and Suzuki coupling reactions [7,8] are most attractive for researchers. Pt is also a commonly used alternative catalyst in fuel cell reactions, especially in oxidation of FA.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical fabrication of multiplicate palladium hierarchical architectures and their electrocatalysis toward oxidation of formic acid

Chai

Bao

et al. 2011

J Solid State Electrochem

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Dendritic, cactoid, splintery flowers-like and spinous flowers-like micro/nano-Pd hierarchical architectures were successfully deposited on the conductive substrates without assistance of any templates. Distinct from other general electrodeposition at a constant potential or cyclic potential, we utilized pulse potentials as deposition and dissolution potential, which were controlled by a simple and convenient electrochemical method-differential pulse amperometry. It was found that the morphologies of these novel micro/nanoparticles could be regulated with different pulse potentials. The resulting nanostructures were characterized by scanning electron microscopy and X-ray diffractometry. The results show that series of Pd micro/ nanoparticles were bounded on the different index facets. It means that the growth direction could be effectively controlled by regulating the pulse potentials. Moreover, the as-synthesized Pd micro/nanoparticles also exhibited strikingly difference in catalytic activity toward electrooxidation of formic acid.

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Electrochemical Synthesis, Voltammetric Behavior, and Electrocatalytic Activity of Pd Nanoparticles

Cited by 142 publications

References 40 publications

Nanoporous PdNi Bimetallic Catalyst with Enhanced Electrocatalytic Performances for Electro-oxidation and Oxygen Reduction Reactions

Nanoporous PdNi Bimetallic Catalyst with Enhanced Electrocatalytic Performances for Electro-oxidation and Oxygen Reduction Reactions

Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism

Electrochemical fabrication of multiplicate palladium hierarchical architectures and their electrocatalysis toward oxidation of formic acid

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