Electrocatalytic reduction of bromate based on Pd nanoparticles uniformly anchored on polyaniline/SBA-15

Sun, Chencheng; Deng, Ning; An, Hao; Cui, Hao; Zhai, Jianping

doi:10.1016/j.chemosphere.2015.08.004

Cited by 11 publications

(7 citation statements)

References 35 publications

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“…Next, the electrocatalytic performance of POM-Mo toward the reduction of bromate (BrO 3 – ) , is evaluated. Bromate is considered to be potentially carcinogenic and nephrotoxic, and it has been classified as a category I, group B2 carcinogen, , with the maximum level in drinking water being set by the European Union and the U.S. Environmental Protection Agency at 10 μg L –1 …”

Section: Introductionmentioning

confidence: 99%

“…Next, the electrocatalytic performance of POM-Mo toward the reduction of bromate (BrO 3 − ) 6,30 is evaluated. Bromate is considered to be potentially carcinogenic and nephrotoxic, and it has been classified as a category I, group B2 carcinogen, 31,32 with the maximum level in drinking water being set by the European Union and the U.S. Environmental Protection Agency at 10 μg L −1 . 33 In our study, the catalytic mechanism for the electro-reduction of bromate is not postulated a priori but inferred from the fitting of theoretical and experimental data; this is not an easy task, considering that multiple catalytic routes can be envisaged.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Support Effects and Mechanistic Details of the Electrocatalytic Activity of Polyoxometalates Investigated via Square Wave Voltacoulometry

et al. 2017

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The catalytic activity of surface-confined molecular species, as affected by the nature of the support, has been investigated by square wave voltacoulometry (SWVC). This technique has proven to be very powerful and advantageous for the study of electroactive and electrocatalytic monolayers. Here, the value of SWVC for the elucidation of the catalytic species and routes when the catalyst can undergo multiple electron transfers is assessed. The redox behavior in acidic water solution of the immobilized Keggin type polyoxomolybdate [PMo 12 O 40 ] 3− and its catalytic performance toward the reduction of bromate have been studied experimentally. Three different supports are considered: boron-doped diamond (BDD), bare glassy carbon, and graphene oxide modified glassy carbon. For all of them, the SWVC response enables the accurate identification and analysis of the catalytic pathways and species. Mechanistic details are easily obtained on the basis of the additivity of the contributions associated with the electron transfer and with the catalytic process to the SWVC response. The results obtained reveal the significant influence of the support on the redox properties and on the catalytic activity of the polyoxomolybdate. Among the supports tested, glassy-carbon supports show the highest catalytic performance with apparent rate constants that are up to 1 order of magnitude faster than those on BDD.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Support Effects and Mechanistic Details of the Electrocatalytic Activity of Polyoxometalates Investigated via Square Wave Voltacoulometry

et al. 2017

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“…The XPS analysis of the palladium black, which was collected after the alcohol oxidation, disclosed two prominent binding energies of 335.7 and 340.9 eV in the Pd 3d 5/2 and 3d 3/2 levels, respectively, indicating that palladium was dominantly present in metallic state, [30,31] and no binding energies for scandium were observed ( Figure 5); however, the EDS analysis revealed a content of 98.48 wt% for palladium with 1.52 wt% of scandium, respectively ( Figure S31). In the XPS analysis, the low intensity bands at 336.5 and 341.9 eV were attributed to palladium oxide, [32][33][34] whereas the intensity band at 338.5 and 343.8 eV were attributed to trace Pd (OAc) 2 .…”

Section: Resultsmentioning

confidence: 99%

Palladium (II)‐catalyzed homogeneous alcohol oxidations: Disclosing the crucial contribution of palladium nanoparticles in catalysis

Zhang

Lou

Xue

et al. 2020

Applied Organom Chemis

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Versatile redox catalysts play the significant roles in alcohol oxidations, in which the mechanisms for homogeneous and heterogeneous alcohol oxidations are generally different. This work introduced a Lewis acid (LA) promoted homogeneous alcohol oxidation with Pd (OAc)2 catalyst by using oxygen balloon as the oxidant source. It was found that adding Lewis acid such as Sc (OTf)3 significantly accelerated Pd (II)‐catalyzed alcohol oxidations; notably, the time courses of oxidations monitored by GC and 1H NMR disclosed that there existed two processes including the initial sluggish oxidation followed by a rapid oxidation. The promotional effect of Lewis acid was attributed to the formation of heterobimetallic Pd (II)/LA species, which improved the oxidizing power of the palladium (II) species, thus accelerating alcohol oxidation in the induction period. Correlating the sizes of in situ generated palladium nanoparticles with the time course of alcohol oxidation further disclosed that the loosely, spherically large nanoparticles, which were composed of many tiny nanoparticles having the size less than 10 nm, were responsible for the rapid oxidation, whereas those highly dispersed, tiny nanoparticles having the size less than 10 nm were not responsible for the rapid oxidation.

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“…Through an in-situ approach, a sensor for BrO 3 − detection was fabricated by Sun et al [60] by the deposition of Pd nanoparticles (PdNPs)-coated PANI on a mesoporous SBA-15 support. A stepwise description of the electrocatalytic reduction process of BrO 3 at the Pd-NPs/PANI/SBA-15 interface is given in Figure 4 while Figure 5 illustrating the cyclic voltammograms of the modified electrode in 0.5 mol L −1 H 2 SO 4 with different BrO 3 concentrations.…”

Section: Determination Of Bromate At Metal/metal Oxide-based Modified...mentioning

confidence: 99%

“…It is noteworthy that the sensitivity of the electrode was ascribed to the availability of large nitrogen sites on the composite for PdNPs anchorage, improved surface area of the electrode due to the presence of SBA-15 and the presence of abundant H + for BrO 3 − reduction. Sun et al [60] enumerated three factors that led to the high sensitivity of Pd-NPs/PANI/ SBA-15 for BrO 3 reduction. These include:…”

Section: Determination Of Bromate At Metal/metal Oxide-based Modified...mentioning

confidence: 99%

Electrochemical Sensors for Determination of Bromate in Water and Food Samples—Review

Balogun

Fayemi

2021

Biosensors

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The application of potassium bromate in the baking industry is used in most parts of the world to avert the human health compromise that characterizes bromates carcinogenic effect. Herein, various methods of its analysis, especially the electrochemical methods of bromate detection, were extensively discussed. Amperometry (AP), cyclic voltammetry (CV), square wave voltammetry (SWV), electrochemiluminescence (ECL), differential pulse voltammetry and electrochemical impedance spectroscopy (EIS) are the techniques that have been deployed for bromate detection in the last two decades, with 50%, 23%, 7.7%, 7.7%, 7.7% and 3.9% application, respectively. Despite the unique electrocatalytic activity of metal phthalocyanine (MP) and carbon quantum dots (CQDs), only few sensors based on MP and CQDs are available compared to the conducting polymers, carbon nanotubes (CNTs), metal (oxide) and graphene-based sensors. This review emboldens the underutilization of CQDs and metal phthalocyanines as sensing materials and briefly discusses the future perspective on MP and CQDs application in bromate detection via EIS.

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Electrocatalytic reduction of bromate based on Pd nanoparticles uniformly anchored on polyaniline/SBA-15

Cited by 11 publications

References 35 publications

Carbon Support Effects and Mechanistic Details of the Electrocatalytic Activity of Polyoxometalates Investigated via Square Wave Voltacoulometry

Carbon Support Effects and Mechanistic Details of the Electrocatalytic Activity of Polyoxometalates Investigated via Square Wave Voltacoulometry

Palladium (II)‐catalyzed homogeneous alcohol oxidations: Disclosing the crucial contribution of palladium nanoparticles in catalysis

Electrochemical Sensors for Determination of Bromate in Water and Food Samples—Review

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