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台湾国立科技大学、深圳哈尔滨工业大学Angew:自适应三组分催化剂实现可持续氨电合成耦合甘油增值转化

  • 2026-02-04 10:04:43
台湾国立科技大学、深圳哈尔滨工业大学Angew:自适应三组分催化剂实现可持续氨电合成耦合甘油增值转化

第一作者:Christean Nicke、David Leander Troglaue、Chia-Yu Chang

通讯作者:李德平、林晓恒、黄炳、刘茉基、高一丹 

通讯单位:德国美茵茨市约翰内斯·古滕贝格大学、台湾国立科技大学、深圳哈尔滨工业大学

研究背景与内容
本研究通过微波辅助与水热沉积法制备了Cu-Cu₂O/Ni-NiO/WO₃@NF三元串联电催化剂,旨在高效催化硝酸盐还原合成氨。
其研究意义在于提出了一种自适应催化剂设计策略以提升合成氨选择性与产率,针对现有催化剂在反应路径调控与中间体管理方面的不足,结合在线微分电化学质谱与密度泛函理论计算揭示了脉冲电解下各组分通过协同作用(Cu-Cu₂O促进硝酸盐还原、Ni-NiO提供*H、WO₃调控加氢过程)动态调控氮中间体、驱动反应向氨定向转化的机理。
实现了97.1%的法拉第效率与43.9 mg·h⁻¹·cm⁻²的氨产率,并通过耦合甘油氧化展示了系统在可持续氨合成与生物质电催化增值中的潜力。
研究要点

要点1:设计并构建了新型三组分串联电催化剂 (Cu-Cu₂O/Ni-NiO/WO₃)

创新性地将Cu-Cu₂O(高效硝酸根还原为亚硝酸根)、Ni-NiO(增强水解离产生活性氢H)和WO₃(作为H存储与反应平衡器)三种功能组分集成于一体。这种设计通过协同作用,精准匹配了硝酸根脱氧、*H供给与中间体深度加氢的串联反应速率,从而显著提升了催化效率,实现了高达97.1%的法拉第效率和创纪录的43.9 mg h⁻¹ cm⁻²的氨产率。

要点2将脉冲电解技术与催化剂设计相结合,并揭示了其动态调控机制

将脉冲电解策略应用于该三组分催化剂体系,并利用在线差分电化学质谱(DEMS)揭示了其作用机理。研究表明,脉冲电解能动态调控关键氮中间体的吸附/脱附行为,从而将反应路径导向选择性生成氨,这是实现高性能的关键技术突破。

要点3:开发了阴极硝酸盐还原与阳极甘油氧化耦合的集成电解系统

本文不仅优化了阴极催化剂,还通过一步热退火处理将原催化剂适应性重构为适用于阳极的CuO-rich组分(Cu-Cu₂O-CuO/Ni-NiO/WO₃),用以驱动甘油氧化反应(GOR)。该策略用热力学更有利的GOR替代了缓慢的析氧反应(OER),在降低整体能耗的同时,在阳极联产了高附加值化学品甲酸,实现了能量与资源利用的双重优化。

图1 E3的结构和化学表征。(a-c)E3整体电极的SEM图像(d)从E3中剥离出的纯催化剂的TEM图像。(e和f)Cu富集区和Ni富集区的EDX元素映射图。(g)Cu富集颗粒的选区电子衍射图(图S8),显示衍射斑点与多晶Cu在(111)、(200)和(202)平面中回收的催化剂的pXRD数据。通过将催化剂在乙醇中长时间超声处理,成中的反射相匹配。(h和i)对应的HRTEM图像。(j)从E3功从NF电极中分离出了纯催化剂。

图3 NO3-RR-至NH3电还原性能评估。(a)NF、E1-E5在1M氢氧化钠溶液中的LSV曲线,含(实线)与不含0.1M硝酸钠(虚线),扫描速率:5mVs-1,未进行iR校正。(b)条形图显示E3在不同静态电位下的NH3产率、NH3FE和NO2-FE的变化情况。(c)对比使用的静态电位与脉冲电位模式。(d)NF、E1-E5分别在静态(-0.6VVs.RHE)和脉冲(0.5VVs.RHE持续1s后为-0.7VVs.)条件下的NH3产率、NH3FE和NO2-FE的表现。RHEfor2s) 电解过程。 (e)NH4+的局部电流密度随NF的变化,E1-E5在静态条件下相对于RHE电压为-0.6V。 (f)E3处的NH3产率及NH3FE在不同NO3-浓度下的变化。(g)使用15NO3-和14NO3-作为氮源时,经NO3-RR处理后电解质溶液的1HNMR谱图。附图:根据UV-vis和1H NMR方法测定的NH3产率。(h)E3在脉冲电解条件下(有/无NO3-)以及OCP状态下NH3浓度的变化。(i)E3在1MNaOH+0.1 MNaNO3溶液中经脉冲电解时的稳定性测试。在恒电位条件下比较E3与近期()开发的镍、铜及WO3基NO3-RR催化剂的氨产率及FE值,以及(k)在碱性介质中报道的NO3-RR催化剂在脉冲电解条件下的表现。

文献链接:

https://doi.org/10.1002/anie.202522014

*以上内容,如有误读和纰漏,敬请指正。

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他,90后,独立PI后发表16篇Nature/Science正刊及子刊,今又发Nature正刊

殷亚东组再发Science:通过磁性纳米结构调控,可以将手性转移到任何非手性分子

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我们道歉,化物所邓德会团队不是一次发2篇大子刊,而是3篇!2 Nat Cataly+1 Nat Synth

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  1. CONNECT:[ UseTime:0.000882s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000976s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000316s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000260s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000579s ]
  6. SELECT * FROM `set` [ RunTime:0.000225s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000698s ]
  8. SELECT * FROM `article` WHERE `id` = 481015 LIMIT 1 [ RunTime:0.001001s ]
  9. UPDATE `article` SET `lasttime` = 1770670027 WHERE `id` = 481015 [ RunTime:0.001899s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000255s ]
  11. SELECT * FROM `article` WHERE `id` < 481015 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000712s ]
  12. SELECT * FROM `article` WHERE `id` > 481015 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000494s ]
  13. SELECT * FROM `article` WHERE `id` < 481015 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001347s ]
  14. SELECT * FROM `article` WHERE `id` < 481015 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005931s ]
  15. SELECT * FROM `article` WHERE `id` < 481015 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001246s ]
0.116472s