Platinum Group Metals Production

Nose, Katsuhiro; Okabe, Toru H.

doi:10.1016/b978-0-08-096988-6.00018-3

Cited by 18 publications

(19 citation statements)

References 11 publications

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“…However, a similar mass activity of 5000 mA mg –1 is achievable with Pd4/GS with a slight increase in overpotential from 326 to 340 mV. Collectively, these results demonstrated Pd as a potential OER catalyst and could reduce the cost of electrochemical water splitting as Pd is present in higher abundance and is less expensive than Ir …”

Section: Resultsmentioning

confidence: 68%

“…Collectively, these results demonstrated Pd as a potential OER catalyst and could reduce the cost of electrochemical water splitting as Pd is present in higher abundance 47 and is less expensive than Ir. 48 At a constant set potential of 1.57 V versus RHE, the Pd4/ GS catalyst demonstrated sustained current (10 mA cm −2 ) for OER (Figure 4c) under harsh oxidative conditions. The stability of Pd4/GS was attributed to the excellent catalytic activity of the as-synthesized catalysts under the tested electrochemical conditions.…”

Section: Synthesis and Characterization Of Size-controlled Pd Nanoclu...mentioning

confidence: 97%

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Facile Biological-Based Synthesis of Size-Controlled Palladium Nanoclusters Anchored on the Surface of Geobacter sulfurreducens and Their Application in Electrocatalysis

Jimenez-Sandoval

Pedireddy

Katuri

et al. 2023

ACS Sustainable Chem. Eng.

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Metal nanoclusters can be synthesized following the top-down or bottom-up approaches involving multiple chemical and/or physical steps where strong ligands, toxic chemicals, and high temperature and pressure are normally applied. In contrast, biological methods eliminate the use and generation of hazardous substances and do not require the application of high temperature and pressure during the synthesis process. Biological methods based on the extracellular electron transfer (EET) capability of electroactive bacteria (EAB) are considered a promising sustainable route for the synthesis of metal nanoparticles; however, a fine control of the size of the nanoparticles has not been achieved yet. Herein, we report a facile biological-based synthesis method of size-controlled palladium (Pd) nanoclusters using the EET capability of Geobacter sulfurreducens. By controlling the metal precursor concentrations and dosing and incubation times, we synthesized size-controlled Pd nanoclusters (1.0 ± 0.6 to 4.8 ± 1.4 nm) anchored on the surface of G. sulfurreducens. The as-synthesized Pd nanoclusters anchored on the surface of G. sulfurreducens cells (Pd/GS) were tested for their performance as bifunctional electrocatalysts for the overall alkaline water splitting reaction. Despite a very low mass loading of 0.002 mg Pd cm −2 , the hybrid material (i.e., Pd/GS) showed exceptionally higher activity for hydrogen evolution reaction (HER) when compared to benchmark 10 wt % Pt/C and Pd/C. Similarly, Pd/GS showed higher activity for oxygen evolution reaction (OER) when compared to Pd/C and comparable OER activity when compared to benchmark IrO 2 . The findings in this study provide a promising sustainable route for designing size-controlled metal nanoclusters anchored on the surface of EAB as efficient and low-cost electrocatalysts for various applications.

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Section: Resultsmentioning

confidence: 68%

Section: Synthesis and Characterization Of Size-controlled Pd Nanoclu...mentioning

confidence: 97%

Facile Biological-Based Synthesis of Size-Controlled Palladium Nanoclusters Anchored on the Surface of Geobacter sulfurreducens and Their Application in Electrocatalysis

Jimenez-Sandoval

Pedireddy

Katuri

et al. 2023

ACS Sustainable Chem. Eng.

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“…4 Additionally, other platinum group metal-based complexes apart from Ru(II) complexes have limited their widespread adoption as ECL luminophores owing to their high cost and limited supply. 5 To overcome these limitations, various organic ECL emitters have recently been developed. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Organic ECL luminophores could control their photophysical and electrochemical properties by chemical modification and functionalisation of the core structure.…”

Section: +mentioning

confidence: 99%

“…4 Additionally, other platinum group metal-based complexes apart from Ru( ii ) complexes have limited their widespread adoption as ECL luminophores owing to their high cost and limited supply. 5…”

mentioning

confidence: 99%

Electrochemiluminescence of dimethylaminonaphthalene-oxazaborine donor–acceptor luminophores

Kim,

et al. 2023

Chem. Commun.

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“…Platinum group metals (PGMs) are significant critical metals because of their wide range of applications, most notably as catalysts. − Palladium is a common catalyst, utilized in many applications and processes such as environmentally important automotive catalytic converters, future energy use in hydrogen storage and production, and large-scale chemical synthesis. − The Suzuki coupling reaction for example is an industrially important reaction frequently used in pharmaceutical drug synthesis, the formulation of agrochemicals, and polymer production. − …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Metal Recycling: Recovery of Palladium from Solution and In Situ Fabrication of Palladium-Carbon Catalysts via Impact Electrochemistry

et al. 2022

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Recycling of critical materials, regeneration of waste, and responsible catalyst manufacture have been repeatedly documented as essential for a sustainable future with respect to the environment and energy production. Electrochemical methods have become increasingly recognized as capable of achieving these goals, and "impact" electrochemistry, with the advantages associated with dynamic nanoelectrodes, has recently emerged as a prime candidate for the recovery of metals from solution. In this report, the nanoimpact technique is used to generate carbon-supported palladium catalysts from low-concentration palladium(II) chloride solutions (i.e., a waste stream mimic) as a proof of concept. Subsequently, the catalytic properties of this material in both synthesis (Suzuki coupling reaction) and electrocatalysis (hydrogen evolution) are demonstrated. Transient reductive impact signals are shown and analyzed at potentials negative of +0.4 V (vs SCE) corresponding to the onset of palladium deposition in traditional voltammetry. Direct evidence of Pd modification was obtained through characterization by environmental scanning electron microscopy/energy-dispersive X-ray spectroscopy, inductively coupled plasma mass spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy, and thermogravimetric analysis of impacted particles. This showed the formation of deposits of Pd0 partially covering the 50 nm carbon black particles with approximately 14% Pd (wt %) under the conditions used. This material was then used to demonstrate the conversion of iodobenzene into its biphenyl product (confirmed through nuclear magnetic resonance) and the successful production of hydrogen as an electrocatalyst under acidic conditions (under cyclic voltammetry).

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Platinum Group Metals Production

Cited by 18 publications

References 11 publications

Facile Biological-Based Synthesis of Size-Controlled Palladium Nanoclusters Anchored on the Surface of Geobacter sulfurreducens and Their Application in Electrocatalysis

Facile Biological-Based Synthesis of Size-Controlled Palladium Nanoclusters Anchored on the Surface of Geobacter sulfurreducens and Their Application in Electrocatalysis

Electrochemiluminescence of dimethylaminonaphthalene-oxazaborine donor–acceptor luminophores

Electrochemical Metal Recycling: Recovery of Palladium from Solution and In Situ Fabrication of Palladium-Carbon Catalysts via Impact Electrochemistry

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