In Situ Electroplating of Ir@Carbon Cloth as High-Performance Selective Oxygen Evolution Reaction Catalyst for Direct Electrolytic Recovery of Lead

Abstract

The hydrometallurgical technology provides an efficient and sustainable green lead recovery process from lead acid batteries. Methanesulfonic acid has been widely considered as a green solvent for lead electrolytic recovery. However, the competitive precipitation of PbO2 at anode and higher overpotential for OER limit the lead recovery efficiency. In this work, an anodic oxygen evolution reaction (OER) catalyst with a low Ir mass fraction of 7.2% is obtained by electroplating iridium on carbon cloth (CC), exhibiting a lower overpotential of 256 mV, longer lifetime of 10 h, and better stability in the 0.5 M MSA solution. When CC-Ir is used as an anodic catalyst for lead recovery in the lead methanesulfonate electrolyte, only a lesser Pb precipitation product with Pb atom mass fraction of 1.42% is found after electrolysis of 10 h, demonstrating the suppression effect of CC-Ir for a PbO2 side reaction. This work proves that the anodic catalyst plays an important role in the lead electrolytic recovery process, which can inhibit the side reaction, reduce the energy consumption, and increase recovery efficiency.

In Situ Synthesis of NiFeLDH/A–CBp from Pyrolytic Carbon as High-Performance Oxygen Evolution Reaction Catalyst for Water Splitting and Zinc Hydrometallurgy

“…Among them, AA-0.1 mmol exhibited the lowest overpotential (227 mV) at 10 mA•cm −2 (Figure 5a). It has excellent electrocatalytic performance compared to similar materials in the past (Table S2) [57][58][59][60][61]. The introduction of AA can improve the Tafel slopes of catalysts, implying that AA can accelerate the charge transfer rate, as indicated in Figure 5b [42].…”

Qualidade de sedimentos na Baía Babitonga e sua implicação na reabertura do Canal do Linguado (SC), Brasil

“…O arsênio, por exemplo, serve para a produção de pesticidas e conservantes de madeira (OSUNA-MARTINÉZ et al, 2021), além de ser comumente encontrado em resíduos de mineração (ACQUAVITA et al, 2021). A grande maioria dos metais é amplamente utilizada no setor industrial, como na formação do latão e ligas metálicas utilizando Cu e Zn (HEWITT & WALL, 2000;ZHUANG & GAO, 2014) e na galvanoplastia (Ni e Pb) (CHE et al, 2023;DI BARI, 2000). Mesmo com a atribuição de uma ação antropogênica e com uma tendência de aumento marcadamente na época de construção do dique, os elementos, quando comparados à Resolução Conama 454/2012, indicaram teores abaixo do nível 1 para águas salobras e salinas.…”

Highly dispersed Ir/Fe nanoparticles anchored at nitrogen-doped activated pyrolytic carbon black as a high-performance OER catalyst for lead recovery

“…The IrFe/CBp sample shows the strongest diffraction peak at 40.7°, corresponding to the (111) crystal plane of Ir (PDF#06-0598), indicating that Ir in the IrFe/CBp sample exists mainly in the form of nanoparticles. 47 However, no diffraction peak of Fe is observed in IrFe/CBp, which may be caused by the low crystallinity of Fe and the interference of the broader diffraction peak of the carbon substrate. Necessarily, the XRD patterns of individual loaded substrates were also examined (Fig.…”