对照实验和原位FTIR揭示了尿素合成的机理:*NH2和*CO偶联生成*CONH2,然后通过多步PCET生成尿素。这些发现为提高电催化剂对尿素电合成的反应动力学能力提供了新的视角,从而有可能推动这一前沿领域的发展。 尿素检测-脲酶:取浓度为5mg mL-1的0.2 mL脲酶溶液加入4ml电解质中,在恒温摇床上反应30分钟,温度调至40℃。
In this study, ferrihydrite-fulvic acid complexes (Fh-FA) with varying C/Fe mole ratios were synthesized, and the adsorption-reduction behaviors of Cr(VI) on Fh-FA were examined using batch experiments, FTIR, BET, XRD, SEM-EDS, and XPS. The results demonstrate that the...
The microstructures of GO and GO-Fe(III) observed by AFM are consistent with those in the SEM, TEM and STEM. The FTIR spectra of GO and GO-Fe(III) are shown in Fig. 3a. GO contains abundant reactive oxygen func- tional groups, such as –COOH, –OH, C = O, and –O...
For comparison with experimentally determined hydrogen production experiments we investigated proton transfer to the active site in the CpI enzyme. Side-chain groups of amino acid residues and water molecules that comprised the proton transfer pathway consisted of ―CH2CH2COOH of Glu282, ―CH2OH of Se...
The specific surface area of FMCBCs increased with increasing Ce content and enhanced the quantity of surface functional groups (–OH, –COOH). The adsorption of As(III) on FMCBCs was well represented by pseudo-second-order kinetics, and the As(III) adsorption capacity of ...
n2RasFnetdhFrF3oecuFagt3hhNotRdhseesaf1ro3e,r9m2p,9r3ae.tsiTeonhnteesodef Conclusions This work presents a simple synthetic route to prepare high-quality Fe, Mn, and Co difluoride NRs via ther- molysis of transition metal (M = Fe, Mn, and Co) trifluoroacetate complexes in TOP and ...
n2RasFnetdhFrF3oecuFagt3hhNotRdhseesaf1ro3e,r9m2p,9r3ae.tsiTeonhnteesodef Conclusions This work presents a simple synthetic route to prepare high-quality Fe, Mn, and Co difluoride NRs via ther- molysis of transition metal (M = Fe, Mn, and Co) trifluoroacetate complexes in TOP and ...
of metal ion fixation based on Fe‑biochar composite Xiao Zhang , Jinchun Xue *, Huaqin Han &Yu Wang In this study, Fe modification of bamboo biochar (BC) with ferrate was used to construct a composite soil amendment based on K2FeO4-biochar (Fe-BC) ...
Visible-light-driven photocatalysts prepared using renewable resources are crucial but challenging to develop for the efficient degradation of organic pollutants, which is required to solve ever-increasing water deterioration issues. In this study, we re
The removal of Cr(VI) was attributed to physical sorption (electrostatic attraction at pH < 3.6 and electrostatic repulsion at pH > 3.6) and the chemical sorption (Cr(VI) reduction to form Cr(OH)3, coordination with oxygen functional groups to form complexes and formed coprecipitation of Cr(...