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南昌大学陈义旺/袁凯团队AM:仿生晶场调控解锁单原子催化剂自旋态实现高效氧还原

  • 2026-06-29 02:59:33
南昌大学陈义旺/袁凯团队AM:仿生晶场调控解锁单原子催化剂自旋态实现高效氧还原

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第一作者裴扬帆;
通讯作者:陈义旺,袁凯;
通讯单位:南昌大学;
原文信息:10.1002/adma.73739

全文速览

近日,南昌大学袁凯教授与陈义旺教授团队在国际顶级期刊《Advanced Materials》(影响因子26.8)上发表题为“Crystal Field Engineering of Bioinspired Dual-Metal Single-Atom Catalysts Via Spin-State Modulation for Efficient Oxygen Electroreduction”的研究论文。该研究受自然界细胞色素c氧化酶(CcO)中双金属协同催化及分级传质通道的启发,提出了一种“双仿生”设计策略,巧妙地将原子尺度的晶场调控与纳微尺度的分级孔道构筑相结合

图文精读

Fig. 1 | 左)CcO的反应机理,涉及电子转移与协同金属中心;(右)晶体场调控的仿生策略.

Fig. 2 | (a)MPNC-FeCo-x合成过程的示意图。(b)MPNC-FeCo-4的SEM图像、(c)TEM图像及(d)对应的EDS元素面扫分布图。(e)MPNC-FeCo-4的AC-HAADF-STEM图像。(f)图2e中S1区域的彩色栅格图及(g)对应的强度剖面图。(h)MPNC-FeCo-4的孔径分布曲线。

Fig. 3 | (a)MPNC-FeCo-x中Fe 2p和Co 2p XPS谱图的结合能变化。MPNC-FeCo-4及参比样品的(b)Fe K边和(c)Co K边的k2加权FT-EXAFS谱图。(d)MPNC-FeCo-4和MPNC-Fe的平均Fe d带电子数的拟合结果。MPNC-FeCo-4(e)和MPNC-Fe(f)的Fe K边WT-EXAFS等高线图.

Fig. 4 | (a)ORR极化曲线,(b)相应的Tafel斜率,以及(c)MPNC-FeCo-x的E1/2和0.9 V处jk的比较。(d)MPNC-FeCo-4及参比样品的ECSA和(e)ECSA归一化jk。(f)由MPNC-FeCo-4、MPNC-FeCo-1、MPNC-FeCo-5(0.9 V)及文献中先进SACs的SDmass和TOF绘制的反应性图谱。(g)接触后电极与电解质界面处价带(VB)和导带(CB)的能带示意图。(h)MPNC-FeCo-1、MPNC-FeCo-4和MPNC-FeCo-5的ND和Vfb.
Fig. 5 | a)MPNC-FeCo-1、MPNC-FeCo-4和MPNC-FeCo-5的磁化率。(b)有效磁矩与d轨道未成对电子数。L.S.代表低自旋,M.S.代表中间自旋,H.S.代表高自旋。(c)MPNC-FeCo-1、MPNC-FeCo-4和MPNC-FeCo-5的低温(T=100 K下记录)EPR谱图。(d)MPNC-FeCo-1和MPNC-FeCo-4的轨道相互作用示意图。(e)MPNC-FeCo-4、(f)MPNC-Fe和(g)MPNC-Co的原位三维ATR-SEIRAS谱图.
Fig. 6 | (a)用于解卷积和定量三相界面动力学的逐级方法示意图。(b)MPNC-FeCo-1和MPNC-FeCo-4的传质扩散电阻和电荷转移电阻。(c)基于MPNC-FeCo-1和MPNC-FeCo-4的液态ZAB在不同电流密度下的DRT谱图。(d)空气阴极的等效电路模型。(e)Rd和δ的示意图。(f)由不同电流密度下MPNC-FeCo-1和MPNC-FeCo-4的Nyquist图推导出的扩散层厚度和Nernst扩散阻抗.

研究结论

综上所述,传统微孔碳材料中,反应物分子往往受限于狭窄的孔道而难以快速抵达活性位点。MPNC-FeCo-4催化剂中介孔(4-10 nm)与微孔的协同分级结构,不仅提供了高达819.9 m2 g-1的比表面积,更关键的是为O2分子的扩散和电解液的浸润提供了快速通道。电化学阻抗谱(EIS)与弛豫时间分布(DRT)联合分析定量揭示:分级孔道显著降低了扩散层厚度(δ)和扩散阻抗(Rd),使得传质过程不再成为反应速率的限制步骤。

论文信息

Cite this article:

Crystal Field Engineering of Bioinspired Dual-Metal Single-Atom Catalysts Via Spin-State Modulation for Efficient Oxygen Electroreduction

https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.73739

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作者简介

陈义旺教授简介:南昌大学和江西师范大学教授,博士生导师,国家杰出青年科学基金获得者,入选国家“万人计划”科技创新领军人才,国家百千万人才工程,德国洪堡奖学金获得者,享受国务院特殊津贴,俄罗斯自然科学院外籍院士。2019年起历任江西师范大学副校长,副书记,2022年任赣南师范大学校长、党委书记,南昌大学高分子及能源化学研究院院长,江西师范大学氟硅能源材料与化学教育部重点实验室主任,江西省化学化工学会理事长,中国化学会会士,教育部科技委委员,《Chinese J. Polym. Sci.》《Science China Materials》《eScience》《Fundamental Research》等编委。主持和完成国家自然科学基金重点项目/中德国际合作项目等、科技部973前期研究专项等项目。以第一作者或通讯作者在Science; Nat. Energy; Nat. Synth.; Nat. Commun.; J. Am. Chem. Soc.; Angew. Chem. Int. Ed.; Adv. Mater.等国际期刊发表学术论文400余篇;获授权发明专利49项;撰写中英文专著2部,教材2部。作为第一完成人获江西省自然科学一等奖、教育部自然科学二等奖、获日内瓦国际发明展金奖、中国发明协会发明创业奖创新奖一等奖、中国产学研合作创新奖、江西省教学成果一等奖1项和二等奖3项、中国侨界贡献奖、获全国宝钢优秀教师奖。

袁凯教授简介:南昌大学教授,博士生导师,国家级青年人才,南昌大学和德国伍珀塔尔大学双博士学位,主要从事储能新材料技术与器件集成方面的研究。以第一或通讯作者在Nat. Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., CCS Chem.等国内外知名期刊发表学术论文80余篇,一篇论文入选2020年度中国百篇最具影响国际学术论文;主编教材一部,撰写英文书籍一章;担任eScience, SusMat, SmartMat, CarbonEnergy和Energy Mater.期刊青年编委。主持国家自然科学基金面上项目等5项、江西省杰出青年科学基金,获博士后创新人才支持计划、江西省“人才计划”、青年井冈学者奖励计划和科技创新杰出青年人才支持计划。获教育部自然科学二等奖、省级教学成果二等奖。

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  1. CONNECT:[ UseTime:0.000374s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000613s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000315s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000312s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000584s ]
  6. SELECT * FROM `set` [ RunTime:0.000273s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000621s ]
  8. SELECT * FROM `article` WHERE `id` = 534779 LIMIT 1 [ RunTime:0.000472s ]
  9. UPDATE `article` SET `lasttime` = 1782683061 WHERE `id` = 534779 [ RunTime:0.000591s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000295s ]
  11. SELECT * FROM `article` WHERE `id` < 534779 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001281s ]
  12. SELECT * FROM `article` WHERE `id` > 534779 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000860s ]
  13. SELECT * FROM `article` WHERE `id` < 534779 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003271s ]
  14. SELECT * FROM `article` WHERE `id` < 534779 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001453s ]
  15. SELECT * FROM `article` WHERE `id` < 534779 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001872s ]
0.085134s