23:T4ba,The oxygen reduction reaction (ORR) is identified as a core issue in the technologies for convert energy, especially in proton-exchange membrane fuel cell (PEMFC). Highly reactive, low-cost, and durable electrocatalysts are ideal for the sluggish ORR. Herein, iron–nitrogen codoped hierarchically porous carbon (Fe-N-HPC-0.05) electrocatalytic material was prepared by a dual-template-assisted strategy. Upon accurate control of metal–organic framework (MOF) composition, Fe/Fe3C nanocrystals, FeNx, and N-doped carbon were produced. Fe-N-HPC-0.05 shows enhanced ORR performance in both alkaline and acidic conditions by taking advantage of the hierarchically porous structure and numerous active sites. In alkaline conditions, Fe-N-HPC-0.05 exhibited similar onset and half-wave potentials compared with 1.02 and 0.85 V for commercial Pt/C, respectively. In acidic conditions, Fe-N-HPC-0.05 possessed half-wave potential of 0.78 V, only 60 mV lower than that of Pt/C (0.84 V), indicating that the Fe-N-HPC-0.05 catalyst has application prospects in PEMFCs. This work also provides the design principle for increasing the ORR catalytic activity of hierarchically porous structure with exposed active sites.24:T522,Removal of hetero ions from the hydrogen peroxide solution is a crucial step in purifying electronic-grade H₂O₂. Conventional adsorption materials are challenged to meet the need for the simultaneous adsorption of both anions and cations in solvents. UiO-66 (Zr) modified by acetic acid and amino group for simultaneous adsorption of phosphate and Pb²⁺ in H₂O₂ purification was fabricated in this work. The as-prepared defective UiO-66-NH₂ (Zr) demonstrated a significant increase in specific surface area and porosity, along with more exposed sites for phosphate and Pb²⁺ adsorption. The adsorption capacity of De-UiO-66-NH₂ for phosphate and Pb²⁺ in H₂O₂ solution was 52.28 mg g^-1 and 35.4 mg g^-1, which is 1.19 times and 1.88 times that of unmodified UiO-66 (Zr), respectively. The trace simultaneous adsorption with both 100 ppb phosphate and Pb²⁺ showed removal rates of 94.0% and 88.7%, respectively, confirming the practicality of MOF materials in the purification of electronic chemicals. This work highlights the potential of Zr-based MOFs as anionic and cationic simultaneous adsorbents for highly efficient purification of electronic-grade solvents.

#	Concept	H-Index	Publications	Citations
1	Engineering	2	2	67
2	Chemistry	2	2	67
3	Materials Science	2	2	67
4	Catalysis	2	2	67
5	Chemical Engineering	1	1	21

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