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2 protocols using dl alanine

1

Synthesis and Characterization of Ni-based Catalysts

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The chemicals used in this work, Ni(NO3)2·6H2O (AR, 98%), citric acid (AR, 99.5%), dl-lactic acid (AR, 99%), pyruvic acid (AR, 98%), dl-alanine (AR, 99%), dl-lactamide (98%), NH3·H2O (AR, 28%), RuCl3·nH2O (Ru ≥ 37.5 wt%), IrCl3 (Ir ≥ 60.0 wt%), RhCl3·3H2O (Rh ≥ 39 wt%), H2PtCl2·6H2O (Pt ≥ 37.5 wt%), PdCl2 (Pd ≥ 60.0 wt%), ethylene glycol (AR, 98%), and ethanol (AR, 99.5%) were purchased from Shanghai Macklin Biochemical Co., Ltd. H2SO4 (AR, 98%), formic acid (AR, 88%), acetic acid (AR, 99.8%), and propanoic acid (AR, 99.5%) were purchased from Sinopharm Chemical Reagent CO., Ltd. All the chemicals were used as received without further purification.
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2

Electrochemical Characterization of CB-GO Composites

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The CB (Carbon Vulcan XC-72) and GO solutions (mean radial dimension: 5–8 μm, thickness: 1 nm, concentration: 2 mg/mL, dispersed in H2O), Tyr (99%, 60-18-4, 25 g), sarcosine (99%, 25 g, 107-97-1), L-serine (99%, 100 g, 56-45-1), L-arginine (98%, 100 g, 74-79-3), L-threonine (99%, 100 g, 72-19-5), DL-alanine (99%, 100 g, 302-72-7), and N-dimethylformamide (DMF; AR, 99.5%, 500 mL) were purchased from Macklin Biochemical Co., Ltd (Shanghai, China). Ethyl alcohol and phosphate buffer (PBS) were purchased from Sigma Aldrich (St Louis, MO, USA). Ag/AgCl, CP, and Pt electrodes were purchased from Lanlike Chemical Electronic High Technology Co., Ltd (Tianjin, China). Nafion D520 dispersion liquid was purchased from Dupont Co., Ltd (Wilmington, DE, USA). Electrochemical measurements were performed at ambient temperature (20–25 °C). Deionized (DI) water (~18.0 MΩ) was obtained from a Millipore system.
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