Mineral-modulated Co catalyst with enhanced adsorption and dissociation of BH4− for hydrogenation of p-nitrophenol to p-aminophenol

Ag Nanoparticles/NiSx/ZnO Nanorods/Carbon Fiber Electrocatalysts for 5-Hydroxymethyl Furfural Oxidation and p-Nitrophenol Reduction: Implications for Green Chemical Electrosynthesis Applications

“…Similarly, the electrochemical reaction of NP (Figure b) undergoes a three-step-two-electron transfer process. However, intermediates cannot be detected generally during the fast reaction …”

“…The growth of water oxidation in electrocatalysis provides a fresh point of focus and applies modified catalysts at the surface of the electrodes and utilizing water as an oxygen supplier can be a solution to this problem. By means of electrochemistry, an effective approach, the active metal (M n + ) center in the modified catalysts could be oxidized to the active intermediates [M ( n +1)+ OH] with higher valence states along with the coordination of water and deprotonation (M n + + H 2 O → M ( n +1)+ OH + H + + e – ). , When appropriate oxidizable organic substrates are added together to the electrolyte, the O from water molecules will be transferred to organics via the hydroxylation reaction of the catalytic intermediates (M ( n +1)+ OH + RH → M n + + ROH + H + ). , …”

In Situ Implantation of Bi2S3 Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol

“…The above kinetic analysis has revealed that the catalytic reduction of 4-NP over Bi 2 S 3 @quasi-Bi-MOF follows the Langmuir–Hinshelwood mechanism. This mechanism involves the formation of hydrogen species through the dissociation of BH 4 – on the surface of the catalyst and the subsequent electron-transfer reaction from the hydrogen species to 4-NP. , Therefore, the versatile electrochemical method was employed to monitor the hydrogen species generated during the reduction reaction process Figure a shows the typical linear sweep voltammetry (LSV) curves of Bi 2 S 3 @quasi-Bi-MOF with a fixed ending potential at 0.5 V and different starting potentials (−0.8, −0.9, 1.1, and 1.2 V), which indicates the three types of hydrogen species generated in the potential window tested.…”

“…67,68 Therefore, the versatile electrochemical method was employed to monitor the hydrogen species generated during the reduction reaction process. 69 Figure 8a shows the typical linear sweep voltammetry (LSV) curves of Bi 2 S 3 @quasi-Bi-MOF with a fixed ending potential at 0.5 V and different starting potentials (−0.8, −0.9, 1.1, and 1.2 V), which indicates the three types of hydrogen species generated in the potential window tested. Low potentials (below −0.5 V) favor the generation of H 2 species.…”

Nickel on Oxidatively Modified Carbon as a Promising Cost-Efficient Catalyst for Reduction of P-Nitrophenol

“…P -nitrophenol is a toxic substance that can penetrate the human body, cause damage to organs, such as kidneys, lungs, and have a harmful influence on the central nervous system, not to mention the poisoning of aquatic life [ 2 , 4 , 5 ]. To prevent the negative environmental impact of p -nitrophenol, it can be reduced to p -aminophenol, the toxicity of which is about 500 times lower [ 6 ]. In addition, p -aminophenol can be used as a photographic developer, corrosion inhibitor, anticorrosion lubricant, hair-dyeing agent, etc.…”